usb: typec: thunderbolt: Disable work before freeing tbt on remove

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Summary

CVECVE-2026-89737
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:20:04 UTC
Updated2026-09-11 20:20:04 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: usb: typec: thunderbolt: Disable work before freeing tbt on remove tbt_altmode_remove() drops the plug and cable references without draining tbt->work. The work function dereferences those references, and can also requeue itself in its error path. The VDM callbacks can queue the same work item. Disable and drain tbt->work before dropping the references. This waits for an existing invocation and prevents subsequent schedule_work() calls from queueing it during teardown. This issue was found by an in-house static analysis tool and confirmed by manual code review.

Risk And Classification

EPSS: 0.001660000 probability, percentile 0.061620000 (date 2026-09-14)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 100e257386595b3f1865ca8a991e2ba74f9701ff ebb840d982a612261cfc8a7687735a140c6c7024 git Not specified
CNA Linux Linux affected 100e257386595b3f1865ca8a991e2ba74f9701ff 0a25484fe22f621e151367a59a82330a22ac80bc git Not specified
CNA Linux Linux affected 100e257386595b3f1865ca8a991e2ba74f9701ff 92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3 git Not specified
CNA Linux Linux affected 6.14 Not specified
CNA Linux Linux unaffected 6.14 semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ebb840d982a612261cfc8a7687735a140c6c7024 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0a25484fe22f621e151367a59a82330a22ac80bc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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