Go to homepageCyberStrike

Menu

Star on GitHub · 3.4k
Sign inDownload

CVE-2026-89899

7.8 · HIGH

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 bl…

Published Sep 16, 2026EPSS 0.16%

Overview

CVE-2026-89899 is a high-severity vulnerability. It was published on September 16, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0fbd5c2327020858c45b2d1c65775d64cdeca523Refgit.kernel.org/stable/c/9a951931d4b4084acd64fa55fc3672a9da45ddf9Refgit.kernel.org/stable/c/9c6ceb0949227c1f0cf0e19393daec72d9889871Refgit.kernel.org/stable/c/a3adb63b121937b97f7fdc51e96564c7c799538b

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89899?

CVE-2026-89899 is a high-severity vulnerability. It was published on September 16, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-89899?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-89899?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-89899?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89899 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999
Watch the demo →