CVE-2026-89737

Summary

In 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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux100e257386595b3f1865ca8a991e2ba74f9701ff < ebb840d982a612261cfc8a7687735a140c6c7024affected
LinuxLinux100e257386595b3f1865ca8a991e2ba74f9701ff < 0a25484fe22f621e151367a59a82330a22ac80bcaffected
LinuxLinux100e257386595b3f1865ca8a991e2ba74f9701ff < 92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3affected
LinuxLinux6.14affected
LinuxLinux0 < 6.14unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References