{
    "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-2026-23421",
        "tracking": {
            "current_release_date": "2026-04-03T16:12:49.331672Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-23421",
            "initial_release_date": "2026-04-03T14:26:48.890548Z",
            "revision_history": [
                {
                    "date": "2026-04-03T14:26:48.890548Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| References created (3)."
                },
                {
                    "date": "2026-04-03T14:26:50.567325Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-04-03T14:39:58.818855Z",
                    "number": "3",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (3).| Products connected (5).| References created (3)."
                },
                {
                    "date": "2026-04-03T14:40:09.810229Z",
                    "number": "4",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-04-03T16:05:36.526640Z",
                    "number": "5",
                    "summary": "NCSC Score updated."
                }
            ],
            "status": "interim",
            "version": "5"
        }
    },
    "product_tree": {
        "branches": [
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:git/b30d5de3d40c3fa642079bac0d91f17091c5f877|<3557359ea3df32430ea7c30f7a708ca9a91d7e0e",
                                "product": {
                                    "name": "vers:git/b30d5de3d40c3fa642079bac0d91f17091c5f877|<3557359ea3df32430ea7c30f7a708ca9a91d7e0e",
                                    "product_id": "CSAFPID-5992105"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:git/b30d5de3d40c3fa642079bac0d91f17091c5f877|<7f971dfd48983074adc7bbcea3ee95ce7aad47cb",
                                "product": {
                                    "name": "vers:git/b30d5de3d40c3fa642079bac0d91f17091c5f877|<7f971dfd48983074adc7bbcea3ee95ce7aad47cb",
                                    "product_id": "CSAFPID-5992104"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:git/b30d5de3d40c3fa642079bac0d91f17091c5f877|<e377182f0266f46f02d01838e6bde67b9dac0d66",
                                "product": {
                                    "name": "vers:git/b30d5de3d40c3fa642079bac0d91f17091c5f877|<e377182f0266f46f02d01838e6bde67b9dac0d66",
                                    "product_id": "CSAFPID-5992106"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:semver/6.18.17|<=6.18.*",
                                "product": {
                                    "name": "vers:semver/6.18.17|<=6.18.*",
                                    "product_id": "CSAFPID-5843428"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:semver/6.19.7|<=6.19.*",
                                "product": {
                                    "name": "vers:semver/6.19.7|<=6.19.*",
                                    "product_id": "CSAFPID-5843429"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:semver/<6.18",
                                "product": {
                                    "name": "vers:semver/<6.18",
                                    "product_id": "CSAFPID-5271421"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/6.18",
                                "product": {
                                    "name": "vers:unknown/6.18",
                                    "product_id": "CSAFPID-5271420"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/7.0-rc3|<=*",
                                "product": {
                                    "name": "vers:unknown/7.0-rc3|<=*",
                                    "product_id": "CSAFPID-5843434"
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "Linux"
                    }
                ],
                "category": "vendor",
                "name": "Linux"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-23421",
            "notes": [
                {
                    "category": "description",
                    "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/configfs: Free ctx_restore_mid_bb in release\n\nctx_restore_mid_bb memory is allocated in wa_bb_store(), but\nxe_config_device_release() only frees ctx_restore_post_bb.\n\nFree ctx_restore_mid_bb[0].cs as well to avoid leaking the allocation\nwhen the configfs device is removed.\n\n(cherry picked from commit a235e7d0098337c3f2d1e8f3610c719a589e115f)",
                    "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-23421"
                },
                {
                    "category": "description",
                    "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/configfs: Free ctx_restore_mid_bb in release\n\nctx_restore_mid_bb memory is allocated in wa_bb_store(), but\nxe_config_device_release() only frees ctx_restore_post_bb.\n\nFree ctx_restore_mid_bb[0].cs as well to avoid leaking the allocation\nwhen the configfs device is removed.\n\n(cherry picked from commit a235e7d0098337c3f2d1e8f3610c719a589e115f)",
                    "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/23xxx/CVE-2026-23421.json"
                },
                {
                    "category": "other",
                    "text": "4.1",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "Is related to a product by vendor Linux",
                    "title": "NCSC Score top decreasing factors"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-5271420",
                    "CSAFPID-5992104",
                    "CSAFPID-5992105",
                    "CSAFPID-5992106"
                ],
                "known_not_affected": [
                    "CSAFPID-5271421",
                    "CSAFPID-5843428",
                    "CSAFPID-5843429",
                    "CSAFPID-5843434"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-23421"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/23xxx/CVE-2026-23421.json"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://git.kernel.org/stable/c/3557359ea3df32430ea7c30f7a708ca9a91d7e0e"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://git.kernel.org/stable/c/7f971dfd48983074adc7bbcea3ee95ce7aad47cb"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://git.kernel.org/stable/c/e377182f0266f46f02d01838e6bde67b9dac0d66"
                }
            ],
            "title": "CVE-2026-23421"
        }
    ]
}