{"id":"CVE-2026-89737","state":"PUBLISHED","title":"usb: typec: thunderbolt: Disable work before freeing tbt on remove","description":"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.","publishedAt":"2026-09-11T19:46:45.250Z","updatedAt":"2026-10-19T08:51:51.314Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"100e257386595b3f1865ca8a991e2ba74f9701ff","status":"affected","lessThan":"ebb840d982a612261cfc8a7687735a140c6c7024","versionType":"git"},{"version":"100e257386595b3f1865ca8a991e2ba74f9701ff","status":"affected","lessThan":"0a25484fe22f621e151367a59a82330a22ac80bc","versionType":"git"},{"version":"100e257386595b3f1865ca8a991e2ba74f9701ff","status":"affected","lessThan":"92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/altmodes/thunderbolt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.14","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/altmodes/thunderbolt.c"]}],"references":["https://git.kernel.org/stable/c/ebb840d982a612261cfc8a7687735a140c6c7024","https://git.kernel.org/stable/c/0a25484fe22f621e151367a59a82330a22ac80bc","https://git.kernel.org/stable/c/92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89737.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89737","state":"PUBLISHED","datePublished":"2026-09-11T19:46:45.250Z","dateUpdated":"2026-10-19T08:51:51.314Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.761Z"},"containers":{"cna":{"title":"usb: typec: thunderbolt: Disable work before freeing tbt on remove","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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"100e257386595b3f1865ca8a991e2ba74f9701ff","status":"affected","lessThan":"ebb840d982a612261cfc8a7687735a140c6c7024","versionType":"git"},{"version":"100e257386595b3f1865ca8a991e2ba74f9701ff","status":"affected","lessThan":"0a25484fe22f621e151367a59a82330a22ac80bc","versionType":"git"},{"version":"100e257386595b3f1865ca8a991e2ba74f9701ff","status":"affected","lessThan":"92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/altmodes/thunderbolt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.14","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/altmodes/thunderbolt.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:51:51.314Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}