CVE-2026-89737

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89737", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.761Z", "datePublished": "2026-09-11T19:46:45.250Z", "dateUpdated": "2026-10-19T08:51:51.314Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:51:51.314Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: thunderbolt: Disable work before freeing tbt on remove\n\ntbt_altmode_remove() drops the plug and cable references without\ndraining tbt->work. The work function dereferences those references,\nand can also requeue itself in its error path. The VDM callbacks can\nqueue the same work item.\n\nDisable and drain tbt->work before dropping the references. This waits\nfor an existing invocation and prevents subsequent schedule_work()\ncalls from queueing it during teardown.\n\nThis issue was found by an in-house static analysis tool and confirmed\nby manual code review."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/typec/altmodes/thunderbolt.c"], "versions": [{"version": "100e257386595b3f1865ca8a991e2ba74f9701ff", "lessThan": "ebb840d982a612261cfc8a7687735a140c6c7024", "status": "affected", "versionType": "git"}, {"version": "100e257386595b3f1865ca8a991e2ba74f9701ff", "lessThan": "0a25484fe22f621e151367a59a82330a22ac80bc", "status": "affected", "versionType": "git"}, {"version": "100e257386595b3f1865ca8a991e2ba74f9701ff", "lessThan": "92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/typec/altmodes/thunderbolt.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ebb840d982a612261cfc8a7687735a140c6c7024"}, {"url": "https://git.kernel.org/stable/c/0a25484fe22f621e151367a59a82330a22ac80bc"}, {"url": "https://git.kernel.org/stable/c/92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3"}], "title": "usb: typec: thunderbolt: Disable work before freeing tbt on remove", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/usb/typec/altmodes/thunderbolt.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ebb840d982a612261cfc8a7687735a140c6c7024", "status": "affected", "version": "100e257386595b3f1865ca8a991e2ba74f9701ff", "versionType": "git"}, {"lessThan": "0a25484fe22f621e151367a59a82330a22ac80bc", "status": "affected", "version": "100e257386595b3f1865ca8a991e2ba74f9701ff", "versionType": "git"}, {"lessThan": "92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3", "status": "affected", "version": "100e257386595b3f1865ca8a991e2ba74f9701ff", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/usb/typec/altmodes/thunderbolt.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: thunderbolt: Disable work before freeing tbt on remove\n\ntbt_altmode_remove() drops the plug and cable references without\ndraining tbt->work. The work function dereferences those references,\nand can also requeue itself in its error path. The VDM callbacks can\nqueue the same work item.\n\nDisable and drain tbt->work before dropping the references. This waits\nfor an existing invocation and prevents subsequent schedule_work()\ncalls from queueing it during teardown.\n\nThis issue was found by an in-house static analysis tool and confirmed\nby manual code review."}], "id": "CVE-2026-89737", "lastModified": "2026-10-19T09:18:16.480", "metrics": {}, "published": "2026-09-11T20:20:04.240", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0a25484fe22f621e151367a59a82330a22ac80bc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ebb840d982a612261cfc8a7687735a140c6c7024"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Thunderbolt driver use-after-free vulnerability", "id": "2532239", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532239"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's USB Type-C Thunderbolt driver. The `tbt_altmode_remove()` function fails to properly disable and drain work items before freeing associated plug and cable references. This oversight can lead to a use-after-free vulnerability, where the system attempts to access memory that has already been released. A local attacker could potentially exploit this to cause a system crash, leading to a denial of service, or possibly achieve arbitrary code execution."], "name": "CVE-2026-89737", "public_date": "2026-09-11T19:46:45Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89737\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89737\nhttps://git.kernel.org/stable/c/0a25484fe22f621e151367a59a82330a22ac80bc\nhttps://git.kernel.org/stable/c/92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3\nhttps://git.kernel.org/stable/c/ebb840d982a612261cfc8a7687735a140c6c7024"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[100e257386595b3f1865ca8a991e2ba74f9701ff,ebb840d982a612261cfc8a7687735a140c6c7024)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[100e257386595b3f1865ca8a991e2ba74f9701ff,0a25484fe22f621e151367a59a82330a22ac80bc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[100e257386595b3f1865ca8a991e2ba74f9701ff,92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T05:15:06.926739+00:00", "updated": "2026-09-15T20:00:08.106110+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}