usb: typec: thunderbolt: Disable work before freeing tbt on remove (CVE-2026-89737) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89737

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

Answer in brief

CVE-2026-89737 records a Unknown severity vulnerability in usb: typec: thunderbolt: Disable work before freeing tbt on remove. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=100e257386595b3f1865ca8a991e2ba74f9701ff <ebb840d982a612261cfc8a7687735a140c6c7024 \|\| >=100e257386595b3f1865ca8a991e2ba74f9701ff <0a25484fe22f621e151367a59a82330a22ac80bc \|\| >=100e257386595b3f1865ca8a991e2ba74f9701ff <92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3	ebb840d982a612261cfc8a7687735a140c6c7024, 0a25484fe22f621e151367a59a82330a22ac80bc, 92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3
Linux/Linuxgeneric	6.14	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to ebb840d982a612261cfc8a7687735a140c6c7024 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.