media: cec: disable delayed work before freeing an interrupted transmit (CVE-2026-89899) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89899

media: cec: disable delayed work before freeing an interrupted transmit

Answer in brief

CVE-2026-89899 records a Unknown severity vulnerability in media: cec: disable delayed work before freeing an interrupted transmit. 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 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 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	>=490d84f6d73c12f4204241cff8651eed60aae914 <9a951931d4b4084acd64fa55fc3672a9da45ddf9 \|\| >=490d84f6d73c12f4204241cff8651eed60aae914 <a3adb63b121937b97f7fdc51e96564c7c799538b \|\| >=490d84f6d73c12f4204241cff8651eed60aae914 <9c6ceb0949227c1f0cf0e19393daec72d9889871 \|\| >=490d84f6d73c12f4204241cff8651eed60aae914 <0fbd5c2327020858c45b2d1c65775d64cdeca523 \|\| e448dfd6d3ec944411f6575bc24e4f8baa1e297f \|\| 2781b86d7e45de09befa5ace296b66787146561f \|\| >=4.18.19 <4.19 \|\| >=4.19.2 <4.20	9a951931d4b4084acd64fa55fc3672a9da45ddf9, a3adb63b121937b97f7fdc51e96564c7c799538b, 9c6ceb0949227c1f0cf0e19393daec72d9889871, 0fbd5c2327020858c45b2d1c65775d64cdeca523, 4.19, 4.20
Linux/Linuxgeneric	4.20	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 9a951931d4b4084acd64fa55fc3672a9da45ddf9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: media: cec: disable delayed work before freeing an interrupted transmit cec_transmit_msg_fh() drops adap->lock to wait for a blocking transmit in wait_for_completion_killable(). If that wait is interrupted by a signal, cancel_delayed_work_sync() can run before the CEC kthread arms the reply timeout via schedule_delayed_work(&data->work) in cec_transmit_done_ts(). The work is then armed after the cancel, and the data is freed with its delayed_work still pending: ODEBUG: free active (active state 0) object: ... hint: cec_wait_timeout Use disable_delayed_work_sync(): it cancels the work and disables it, so the later schedule_delayed_work() becomes a no-op and the work cannot be re-armed. The data is freed right after, so it need not be re-enabled.

Quoted source text, attributed separately from HOL analysis.