{
    "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-2026-10654",
        "tracking": {
            "current_release_date": "2026-09-06T15:02:26.989396Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-10654",
            "initial_release_date": "2026-06-30T16:59:22.740283Z",
            "revision_history": [
                {
                    "date": "2026-06-30T16:59:22.740283Z",
                    "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": "2026-06-30T16:59:24.365548Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-06-30T17:40:27.590962Z",
                    "number": "3",
                    "summary": "Unknown change."
                },
                {
                    "date": "2026-06-30T17:49:00.134972Z",
                    "number": "4",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)."
                },
                {
                    "date": "2026-06-30T17:49:02.764629Z",
                    "number": "5",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-07-01T14:45:33.952233Z",
                    "number": "6",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-07-01T14:45:37.781774Z",
                    "number": "7",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-07-06T20:28:23.896437Z",
                    "number": "8",
                    "summary": "Products created (1).| Product Identifiers created (1).| Exploits created (1)."
                },
                {
                    "date": "2026-07-06T20:28:26.393783Z",
                    "number": "9",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-07-10T15:41:45.100722Z",
                    "number": "10",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-07-10T15:41:46.475118Z",
                    "number": "11",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-08-11T15:11:53.081368Z",
                    "number": "12",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-08-11T15:13:09.131499Z",
                    "number": "13",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-09-02T10:45:46.180737Z",
                    "number": "14",
                    "summary": "EPSS updated."
                },
                {
                    "date": "2026-09-02T23:35:01.020436Z",
                    "number": "15",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-09-03T14:38:16.316823Z",
                    "number": "16",
                    "summary": "EPSS updated."
                },
                {
                    "date": "2026-09-03T19:01:41.674382Z",
                    "number": "17",
                    "summary": "EPSS updated."
                },
                {
                    "date": "2026-09-04T15:47:42.099147Z",
                    "number": "18",
                    "summary": "EPSS updated."
                },
                {
                    "date": "2026-09-04T15:47:43.009906Z",
                    "number": "19",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-09-05T15:45:34.568440Z",
                    "number": "20",
                    "summary": "EPSS updated."
                }
            ],
            "status": "interim",
            "version": "20"
        }
    },
    "product_tree": {
        "branches": [
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:semver/1.6.0|<4.5.0",
                                "product": {
                                    "name": "vers:semver/1.6.0|<4.5.0",
                                    "product_id": "CSAFPID-8517638"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/>=1.6.0|<=4.4.1",
                                "product": {
                                    "name": "vers:unknown/>=1.6.0|<=4.4.1",
                                    "product_id": "CSAFPID-8537800",
                                    "product_identification_helper": {
                                        "cpe": "cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*"
                                    }
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "Zephyr"
                    }
                ],
                "category": "vendor",
                "name": "Zephyrproject"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-10654",
            "cwe": {
                "id": "CWE-362",
                "name": "Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"
            },
            "notes": [
                {
                    "category": "description",
                    "text": "A race condition in the Zephyr Bluetooth Classic RFCOMM host stack (subsys/bluetooth/host/classic/rfcomm.c) mishandles a simultaneous bidirectional session disconnect. When the local device has initiated a session teardown (state BT_RFCOMM_STATE_DISCONNECTING, DISC sent, RTX timer armed) and the connected peer concurrently sends its own DISC frame for dlci 0, rfcomm_handle_disc() invokes rfcomm_session_disconnected(), which unconditionally forced the session to BT_RFCOMM_STATE_DISCONNECTED without ever calling bt_l2cap_chan_disconnect().\n\nBecause the recovery timer was also cancelled and a later UA is ignored in the DISCONNECTED state, the session becomes permanently wedged: the underlying L2CAP channel is never released and the session slot in the fixed bt_rfcomm_pool[CONFIG_BT_MAX_CONN] array is never reclaimed (its conn pointer stays set).\n\nSubsequent bt_rfcomm_dlc_connect() calls on that connection fail with -EINVAL due to the invalid session state, so RFCOMM service is denied for that peer, and repeated occurrences can exhaust the session pool. The DISC frame is peer-controlled over the air, but exploitation requires the peer's DISC to collide with a local-initiated disconnect (a high-complexity timing race). Impact is availability/resource-leak only; there is no memory-safety, confidentiality, or integrity consequence. The defect shipped in released versions (present in v4.4.0 and earlier).\n\nThe fix only transitions to DISCONNECTED when the session is not already in DISCONNECTING, preserving the proper L2CAP teardown path.",
                    "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-10654"
                },
                {
                    "category": "description",
                    "text": "A race condition in the Zephyr Bluetooth Classic RFCOMM host stack (subsys/bluetooth/host/classic/rfcomm.c) mishandles a simultaneous bidirectional session disconnect. When the local device has initiated a session teardown (state BT_RFCOMM_STATE_DISCONNECTING, DISC sent, RTX timer armed) and the connected peer concurrently sends its own DISC frame for dlci 0, rfcomm_handle_disc() invokes rfcomm_session_disconnected(), which unconditionally forced the session to BT_RFCOMM_STATE_DISCONNECTED without ever calling bt_l2cap_chan_disconnect().\n\nBecause the recovery timer was also cancelled and a later UA is ignored in the DISCONNECTED state, the session becomes permanently wedged: the underlying L2CAP channel is never released and the session slot in the fixed bt_rfcomm_pool[CONFIG_BT_MAX_CONN] array is never reclaimed (its conn pointer stays set).\n\nSubsequent bt_rfcomm_dlc_connect() calls on that connection fail with -EINVAL due to the invalid session state, so RFCOMM service is denied for that peer, and repeated occurrences can exhaust the session pool. The DISC frame is peer-controlled over the air, but exploitation requires the peer's DISC to collide with a local-initiated disconnect (a high-complexity timing race). Impact is availability/resource-leak only; there is no memory-safety, confidentiality, or integrity consequence. The defect shipped in released versions (present in v4.4.0 and earlier).\n\nThe fix only transitions to DISCONNECTED when the session is not already in DISCONNECTING, preserving the proper L2CAP teardown path.",
                    "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/10xxx/CVE-2026-10654.json"
                },
                {
                    "category": "other",
                    "text": "0.00172",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "3.3",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "The value of the most recent EPSS score, 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-8517638",
                    "CSAFPID-8537800"
                ]
            },
            "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-2026-10654.json"
                },
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-10654"
                },
                {
                    "category": "external",
                    "summary": "Source - ncscclear",
                    "url": "https://vulnerabilities.ncsc.nl/manual/CVE-2026-10654"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://github.com/zephyrproject-rtos/zephyr/commit/c67b59f891a3a8697f1edb2a0e559fc267e75cc2"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-4m37-wp5x-hq4h"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
                        "baseScore": 3.1,
                        "baseSeverity": "LOW"
                    },
                    "products": [
                        "CSAFPID-8517638",
                        "CSAFPID-8537800"
                    ]
                }
            ],
            "title": "CVE-2026-10654"
        }
    ]
}