CVE-2026-89737

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

N/A
Published: September 11, 2026 at 07:46 PM UTC
Updated: October 19, 2026 at 09:18 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
N/A
Exploit prediction
EPSS 0.2%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

100e257386595b3f1865ca8a991e2ba74f9701ff6.14
Vendor states this is fixed in 0a25484fe22f621e151367a59a82330a22ac80bc (fixed)
Vendor states this is fixed in 92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3 (fixed)
Vendor states this is fixed in ebb840d982a612261cfc8a7687735a140c6c7024 (fixed)
Vendor states this is fixed in 6.14 (unaffected)
Vendor states this is fixed in 6.18.50 (unaffected)
Vendor states this is fixed in 7.2.4 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

Quick Info

StatusRECEIVED

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