{
    "document": {
        "category": "csaf_base",
        "csaf_version": "2.0",
        "distribution": {
            "tlp": {
                "label": "WHITE"
            }
        },
        "lang": "en",
        "notes": [
            {
                "category": "legal_disclaimer",
                "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
            }
        ],
        "publisher": {
            "category": "coordinator",
            "contact_details": "cert@ncsc.nl",
            "name": "National Cyber Security Centre",
            "namespace": "https://www.ncsc.nl/"
        },
        "title": "CVE-2026-10636",
        "tracking": {
            "current_release_date": "2026-09-06T15:02:46.588140Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-10636",
            "initial_release_date": "2026-06-16T15:42:43.088320Z",
            "revision_history": [
                {
                    "date": "2026-06-16T15:42:43.088320Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (2).| CWES updated (1)."
                },
                {
                    "date": "2026-06-16T15:42:44.515296Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-06-16T15:47:43.653906Z",
                    "number": "3",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)."
                },
                {
                    "date": "2026-06-16T15:47:45.747949Z",
                    "number": "4",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-06-16T17:07:51.452957Z",
                    "number": "5",
                    "summary": "Unknown change."
                },
                {
                    "date": "2026-06-17T14:34:30.147861Z",
                    "number": "6",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-06-17T14:34:34.306446Z",
                    "number": "7",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-07-01T15:34:11.043970Z",
                    "number": "8",
                    "summary": "Products created (1).| Product Identifiers created (1).| Exploits created (1)."
                },
                {
                    "date": "2026-07-01T15:34:12.978696Z",
                    "number": "9",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-07-10T15:41:50.585619Z",
                    "number": "10",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-07-13T02:49:28.863199Z",
                    "number": "11",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (63).| References created (4).| CWES updated (1)."
                },
                {
                    "date": "2026-07-13T02:49:39.082900Z",
                    "number": "12",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-07-14T20:04:19.982609Z",
                    "number": "13",
                    "summary": "Description removed for source.| Description created for source."
                },
                {
                    "date": "2026-07-14T20:04:23.890401Z",
                    "number": "14",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-07-14T20:18:58.783833Z",
                    "number": "15",
                    "summary": "Description removed for source.| Description created for source."
                },
                {
                    "date": "2026-07-15T09:05:34.432710Z",
                    "number": "16",
                    "summary": "Description removed for source.| Description created for source."
                },
                {
                    "date": "2026-08-11T15:11:53.694903Z",
                    "number": "17",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-08-11T15:11:55.569086Z",
                    "number": "18",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-09-02T10:45:46.644924Z",
                    "number": "19",
                    "summary": "EPSS updated."
                },
                {
                    "date": "2026-09-02T23:34:58.286576Z",
                    "number": "20",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-09-03T14:38:17.138163Z",
                    "number": "21",
                    "summary": "EPSS updated."
                },
                {
                    "date": "2026-09-03T19:01:42.154710Z",
                    "number": "22",
                    "summary": "EPSS updated."
                },
                {
                    "date": "2026-09-04T15:47:42.622036Z",
                    "number": "23",
                    "summary": "EPSS updated."
                },
                {
                    "date": "2026-09-05T03:59:20.302968Z",
                    "number": "24",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-09-05T15:45:35.268922Z",
                    "number": "25",
                    "summary": "EPSS updated."
                }
            ],
            "status": "interim",
            "version": "25"
        }
    },
    "product_tree": {
        "branches": [
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:semver/2.6.0|<4.5.0",
                                "product": {
                                    "name": "vers:semver/2.6.0|<4.5.0",
                                    "product_id": "CSAFPID-8467528"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/>=2.6.0|<4.5.0",
                                "product": {
                                    "name": "vers:unknown/>=2.6.0|<4.5.0",
                                    "product_id": "CSAFPID-8523345",
                                    "product_identification_helper": {
                                        "cpe": "cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*"
                                    }
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "Zephyr"
                    }
                ],
                "category": "vendor",
                "name": "Zephyrproject"
            },
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v2.6.0",
                                "product": {
                                    "name": "vers:unknown/v2.6.0",
                                    "product_id": "CSAFPID-689688"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v2.7.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v2.7.0-rc1",
                                    "product_id": "CSAFPID-5591592"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v2.7.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v2.7.0-rc2",
                                    "product_id": "CSAFPID-5591593"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v2.7.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v2.7.0-rc3",
                                    "product_id": "CSAFPID-5591594"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v2.7.99",
                                "product": {
                                    "name": "vers:unknown/v2.7.99",
                                    "product_id": "CSAFPID-5591595"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.0.0",
                                "product": {
                                    "name": "vers:unknown/v3.0.0",
                                    "product_id": "CSAFPID-5591596"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.0.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v3.0.0-rc1",
                                    "product_id": "CSAFPID-5591597"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.0.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v3.0.0-rc2",
                                    "product_id": "CSAFPID-5591598"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.0.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v3.0.0-rc3",
                                    "product_id": "CSAFPID-5591599"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.1.0",
                                "product": {
                                    "name": "vers:unknown/v3.1.0",
                                    "product_id": "CSAFPID-5591600"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.1.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v3.1.0-rc1",
                                    "product_id": "CSAFPID-5591601"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.1.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v3.1.0-rc2",
                                    "product_id": "CSAFPID-5591602"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.1.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v3.1.0-rc3",
                                    "product_id": "CSAFPID-5591603"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.2.0",
                                "product": {
                                    "name": "vers:unknown/v3.2.0",
                                    "product_id": "CSAFPID-5591604"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.2.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v3.2.0-rc1",
                                    "product_id": "CSAFPID-5591605"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.2.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v3.2.0-rc2",
                                    "product_id": "CSAFPID-5591606"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.2.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v3.2.0-rc3",
                                    "product_id": "CSAFPID-5591607"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.3.0",
                                "product": {
                                    "name": "vers:unknown/v3.3.0",
                                    "product_id": "CSAFPID-5591608"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.3.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v3.3.0-rc1",
                                    "product_id": "CSAFPID-5591609"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.3.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v3.3.0-rc2",
                                    "product_id": "CSAFPID-5591610"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.3.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v3.3.0-rc3",
                                    "product_id": "CSAFPID-5591611"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.4.0",
                                "product": {
                                    "name": "vers:unknown/v3.4.0",
                                    "product_id": "CSAFPID-5591612"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.4.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v3.4.0-rc1",
                                    "product_id": "CSAFPID-5591613"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.4.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v3.4.0-rc2",
                                    "product_id": "CSAFPID-5591614"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.4.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v3.4.0-rc3",
                                    "product_id": "CSAFPID-5591615"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.5.0",
                                "product": {
                                    "name": "vers:unknown/v3.5.0",
                                    "product_id": "CSAFPID-5596063"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.5.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v3.5.0-rc1",
                                    "product_id": "CSAFPID-5591640"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.5.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v3.5.0-rc2",
                                    "product_id": "CSAFPID-5591641"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.5.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v3.5.0-rc3",
                                    "product_id": "CSAFPID-5591642"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.6.0",
                                "product": {
                                    "name": "vers:unknown/v3.6.0",
                                    "product_id": "CSAFPID-5596064"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.6.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v3.6.0-rc1",
                                    "product_id": "CSAFPID-5596065"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.6.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v3.6.0-rc2",
                                    "product_id": "CSAFPID-5596066"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.6.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v3.6.0-rc3",
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                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.7.0",
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                                    "name": "vers:unknown/v3.7.0",
                                    "product_id": "CSAFPID-5596069"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.7.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v3.7.0-rc1",
                                    "product_id": "CSAFPID-5596070"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.7.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v3.7.0-rc2",
                                    "product_id": "CSAFPID-5596071"
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                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v3.7.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v3.7.0-rc3",
                                    "product_id": "CSAFPID-5596072"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.0.0",
                                "product": {
                                    "name": "vers:unknown/v4.0.0",
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                            },
                            {
                                "category": "product_version_range",
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                                "product": {
                                    "name": "vers:unknown/v4.0.0-rc1",
                                    "product_id": "CSAFPID-5604264"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.0.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v4.0.0-rc2",
                                    "product_id": "CSAFPID-5604265"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.0.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v4.0.0-rc3",
                                    "product_id": "CSAFPID-5604266"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.1.0",
                                "product": {
                                    "name": "vers:unknown/v4.1.0",
                                    "product_id": "CSAFPID-5604267"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.1.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v4.1.0-rc1",
                                    "product_id": "CSAFPID-5604268"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.1.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v4.1.0-rc2",
                                    "product_id": "CSAFPID-5604269"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.1.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v4.1.0-rc3",
                                    "product_id": "CSAFPID-5604270"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.2.0",
                                "product": {
                                    "name": "vers:unknown/v4.2.0",
                                    "product_id": "CSAFPID-8566770"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.2.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v4.2.0-rc1",
                                    "product_id": "CSAFPID-8566773"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.2.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v4.2.0-rc2",
                                    "product_id": "CSAFPID-8566772"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.2.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v4.2.0-rc3",
                                    "product_id": "CSAFPID-8566771"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.3.0",
                                "product": {
                                    "name": "vers:unknown/v4.3.0",
                                    "product_id": "CSAFPID-8570147"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.3.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v4.3.0-rc1",
                                    "product_id": "CSAFPID-8570150"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.3.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v4.3.0-rc2",
                                    "product_id": "CSAFPID-8570149"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.3.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v4.3.0-rc3",
                                    "product_id": "CSAFPID-8570148"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.4.0-rc1",
                                "product": {
                                    "name": "vers:unknown/v4.4.0-rc1",
                                    "product_id": "CSAFPID-8570146"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.4.0-rc2",
                                "product": {
                                    "name": "vers:unknown/v4.4.0-rc2",
                                    "product_id": "CSAFPID-8570145"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/v4.4.0-rc3",
                                "product": {
                                    "name": "vers:unknown/v4.4.0-rc3",
                                    "product_id": "CSAFPID-8570144"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/zephyr-v2.6.0",
                                "product": {
                                    "name": "vers:unknown/zephyr-v2.6.0",
                                    "product_id": "CSAFPID-5591634"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/zephyr-v3.0.0",
                                "product": {
                                    "name": "vers:unknown/zephyr-v3.0.0",
                                    "product_id": "CSAFPID-5591635"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/zephyr-v3.1.0",
                                "product": {
                                    "name": "vers:unknown/zephyr-v3.1.0",
                                    "product_id": "CSAFPID-5591636"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/zephyr-v3.2.0",
                                "product": {
                                    "name": "vers:unknown/zephyr-v3.2.0",
                                    "product_id": "CSAFPID-5591637"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/zephyr-v3.3.0",
                                "product": {
                                    "name": "vers:unknown/zephyr-v3.3.0",
                                    "product_id": "CSAFPID-5591638"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/zephyr-v3.4.0",
                                "product": {
                                    "name": "vers:unknown/zephyr-v3.4.0",
                                    "product_id": "CSAFPID-5591639"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/zephyr-v3.5.0",
                                "product": {
                                    "name": "vers:unknown/zephyr-v3.5.0",
                                    "product_id": "CSAFPID-5596068"
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "zephyr"
                    }
                ],
                "category": "vendor",
                "name": "zephyrproject-rtos"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-10636",
            "cwe": {
                "id": "CWE-416",
                "name": "Use After Free"
            },
            "notes": [
                {
                    "category": "description",
                    "text": "In Zephyr's IPv4 IGMP implementation, igmp_send() in subsys/net/ip/igmp.c read the network interface back out of the packet via net_pkt_iface(pkt) after the packet had been handed to net_send_data(). On the successful-send path the packet's last reference may already have been released by the L2 driver or by the network stack's TX handling (synchronously in the default NET_TC_TX_COUNT=0 immediate-transmit configuration), returning the net_pkt slab block to its free list. The subsequent net_pkt_iface(pkt) dereferences the freed packet, a use-after-free read; with CONFIG_NET_STATISTICS_PER_INTERFACE the resulting dangling interface pointer is further dereferenced for a statistics-counter write.\n\nThe IGMP send path is reachable without authentication from inbound IPv4 IGMP membership queries addressed to 224.0.0.1 (net_ipv4_igmp_input -> send_igmp_report/send_igmp_v3_report -> igmp_send), as well as from local multicast join/leave/rejoin operations.\n\nRealistic impact is undefined behavior and potential denial of service (sporadic crash or stats corruption); a controllable write requires the asynchronous TX path plus a concurrent slab reuse.\n\nThe flaw was introduced with IGMPv2 support and affects releases from v2.6.0 through v4.4.0. The fix caches the interface pointer before sending. Note the analogous IPv6 MLD path (mld_send in subsys/net/ip/ipv6_mld.c) retains the same unfixed pattern.",
                    "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-10636"
                },
                {
                    "category": "description",
                    "text": "In Zephyr's IPv4 IGMP implementation, igmp_send() in subsys/net/ip/igmp.c read the network interface back out of the packet via net_pkt_iface(pkt) after the packet had been handed to net_send_data(). On the successful-send path the packet's last reference may already have been released by the L2 driver or by the network stack's TX handling (synchronously in the default NET_TC_TX_COUNT=0 immediate-transmit configuration), returning the net_pkt slab block to its free list. The subsequent net_pkt_iface(pkt) dereferences the freed packet, a use-after-free read; with CONFIG_NET_STATISTICS_PER_INTERFACE the resulting dangling interface pointer is further dereferenced for a statistics-counter write.\n\nThe IGMP send path is reachable without authentication from inbound IPv4 IGMP membership queries addressed to 224.0.0.1 (net_ipv4_igmp_input -> send_igmp_report/send_igmp_v3_report -> igmp_send), as well as from local multicast join/leave/rejoin operations.\n\nRealistic impact is undefined behavior and potential denial of service (sporadic crash or stats corruption); a controllable write requires the asynchronous TX path plus a concurrent slab reuse.\n\nThe flaw was introduced with IGMPv2 support and affects releases from v2.6.0 through v4.4.0. The fix caches the interface pointer before sending. Note the analogous IPv6 MLD path (mld_send in subsys/net/ip/ipv6_mld.c) retains the same unfixed pattern.",
                    "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-10636.json?alt=media"
                },
                {
                    "category": "description",
                    "text": "In Zephyr's IPv4 IGMP implementation, igmp_send() in subsys/net/ip/igmp.c read the network interface back out of the packet via net_pkt_iface(pkt) after the packet had been handed to net_send_data(). On the successful-send path the packet's last reference may already have been released by the L2 driver or by the network stack's TX handling (synchronously in the default NET_TC_TX_COUNT=0 immediate-transmit configuration), returning the net_pkt slab block to its free list. The subsequent net_pkt_iface(pkt) dereferences the freed packet, a use-after-free read; with CONFIG_NET_STATISTICS_PER_INTERFACE the resulting dangling interface pointer is further dereferenced for a statistics-counter write.\n\nThe IGMP send path is reachable without authentication from inbound IPv4 IGMP membership queries addressed to 224.0.0.1 (net_ipv4_igmp_input -> send_igmp_report/send_igmp_v3_report -> igmp_send), as well as from local multicast join/leave/rejoin operations.\n\nRealistic impact is undefined behavior and potential denial of service (sporadic crash or stats corruption); a controllable write requires the asynchronous TX path plus a concurrent slab reuse.\n\nThe flaw was introduced with IGMPv2 support and affects releases from v2.6.0 through v4.4.0. The fix caches the interface pointer before sending. Note the analogous IPv6 MLD path (mld_send in subsys/net/ip/ipv6_mld.c) retains the same unfixed pattern.",
                    "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/10xxx/CVE-2026-10636.json"
                },
                {
                    "category": "other",
                    "text": "0.00308",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "4.0",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "Is related to CWE-416 (Use After Free)",
                    "title": "NCSC Score top increasing factors"
                },
                {
                    "category": "other",
                    "text": "Is related to an uncommon product vendor, Is related to (a version of) an uncommon product, There is exploit data available from source Nvd, There is cwe data available from source Nvd",
                    "title": "NCSC Score top decreasing factors"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-8467528",
                    "CSAFPID-8523345",
                    "CSAFPID-689688",
                    "CSAFPID-5591592",
                    "CSAFPID-5591593",
                    "CSAFPID-5591594",
                    "CSAFPID-5591595",
                    "CSAFPID-5591596",
                    "CSAFPID-5591597",
                    "CSAFPID-5591598",
                    "CSAFPID-5591599",
                    "CSAFPID-5591600",
                    "CSAFPID-5591601",
                    "CSAFPID-5591602",
                    "CSAFPID-5591603",
                    "CSAFPID-5591604",
                    "CSAFPID-5591605",
                    "CSAFPID-5591606",
                    "CSAFPID-5591607",
                    "CSAFPID-5591608",
                    "CSAFPID-5591609",
                    "CSAFPID-5591610",
                    "CSAFPID-5591611",
                    "CSAFPID-5591612",
                    "CSAFPID-5591613",
                    "CSAFPID-5591614",
                    "CSAFPID-5591615",
                    "CSAFPID-5591634",
                    "CSAFPID-5591635",
                    "CSAFPID-5591636",
                    "CSAFPID-5591637",
                    "CSAFPID-5591638",
                    "CSAFPID-5591639",
                    "CSAFPID-5591640",
                    "CSAFPID-5591641",
                    "CSAFPID-5591642",
                    "CSAFPID-5596063",
                    "CSAFPID-5596064",
                    "CSAFPID-5596065",
                    "CSAFPID-5596066",
                    "CSAFPID-5596067",
                    "CSAFPID-5596068",
                    "CSAFPID-5596069",
                    "CSAFPID-5596070",
                    "CSAFPID-5596071",
                    "CSAFPID-5596072",
                    "CSAFPID-5604263",
                    "CSAFPID-5604264",
                    "CSAFPID-5604265",
                    "CSAFPID-5604266",
                    "CSAFPID-5604267",
                    "CSAFPID-5604268",
                    "CSAFPID-5604269",
                    "CSAFPID-5604270",
                    "CSAFPID-8566770",
                    "CSAFPID-8566771",
                    "CSAFPID-8566772",
                    "CSAFPID-8566773",
                    "CSAFPID-8570144",
                    "CSAFPID-8570145",
                    "CSAFPID-8570146",
                    "CSAFPID-8570147",
                    "CSAFPID-8570148",
                    "CSAFPID-8570149",
                    "CSAFPID-8570150"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/10xxx/CVE-2026-10636.json"
                },
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-10636"
                },
                {
                    "category": "external",
                    "summary": "Source - osv",
                    "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-10636.json?alt=media"
                },
                {
                    "category": "external",
                    "summary": "Source - ncscclear",
                    "url": "https://vulnerabilities.ncsc.nl/manual/CVE-2026-10636"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd; osv",
                    "url": "https://github.com/zephyrproject-rtos/zephyr/commit/0223e5e3ec5ebc51e8d0328fc3e604fa43552f54"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd; osv",
                    "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fj6q-975v-65c9"
                },
                {
                    "category": "external",
                    "summary": "Reference - osv",
                    "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10636.json"
                },
                {
                    "category": "external",
                    "summary": "Reference - osv",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10636"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
                        "baseScore": 3.7,
                        "baseSeverity": "LOW"
                    },
                    "products": [
                        "CSAFPID-5591592",
                        "CSAFPID-5591593",
                        "CSAFPID-5591594",
                        "CSAFPID-5591595",
                        "CSAFPID-5591596",
                        "CSAFPID-5591597",
                        "CSAFPID-5591598",
                        "CSAFPID-5591599",
                        "CSAFPID-5591600",
                        "CSAFPID-5591601",
                        "CSAFPID-5591602",
                        "CSAFPID-5591603",
                        "CSAFPID-5591604",
                        "CSAFPID-5591605",
                        "CSAFPID-5591606",
                        "CSAFPID-5591607",
                        "CSAFPID-5591608",
                        "CSAFPID-5591609",
                        "CSAFPID-5591610",
                        "CSAFPID-5591611",
                        "CSAFPID-5591612",
                        "CSAFPID-5591613",
                        "CSAFPID-5591614",
                        "CSAFPID-5591615",
                        "CSAFPID-5591634",
                        "CSAFPID-5591635",
                        "CSAFPID-5591636",
                        "CSAFPID-5591637",
                        "CSAFPID-5591638",
                        "CSAFPID-5591639",
                        "CSAFPID-5591640",
                        "CSAFPID-5591641",
                        "CSAFPID-5591642",
                        "CSAFPID-5596063",
                        "CSAFPID-5596064",
                        "CSAFPID-5596065",
                        "CSAFPID-5596066",
                        "CSAFPID-5596067",
                        "CSAFPID-5596068",
                        "CSAFPID-5596069",
                        "CSAFPID-5596070",
                        "CSAFPID-5596071",
                        "CSAFPID-5596072",
                        "CSAFPID-5604263",
                        "CSAFPID-5604264",
                        "CSAFPID-5604265",
                        "CSAFPID-5604266",
                        "CSAFPID-5604267",
                        "CSAFPID-5604268",
                        "CSAFPID-5604269",
                        "CSAFPID-5604270",
                        "CSAFPID-689688",
                        "CSAFPID-8467528",
                        "CSAFPID-8523345",
                        "CSAFPID-8566770",
                        "CSAFPID-8566771",
                        "CSAFPID-8566772",
                        "CSAFPID-8566773",
                        "CSAFPID-8570144",
                        "CSAFPID-8570145",
                        "CSAFPID-8570146",
                        "CSAFPID-8570147",
                        "CSAFPID-8570148",
                        "CSAFPID-8570149",
                        "CSAFPID-8570150"
                    ]
                }
            ],
            "title": "CVE-2026-10636"
        }
    ]
}