CVE-2026-89897 media: cec: Serialize exclusive follower delivery
A race condition in the Linux kernel CEC driver allows concurrent access to exclusive follower pointers, potentially causing system instability or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-89897?
CVE-2026-89897 is a high-severity vulnerability in Linux, published on 16 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
media: cec: Serialize exclusive follower delivery
cec_receive_notify() reads the exclusive follower pointer without the adapter lock. Serialize the no-follower check and message delivery against mode changes and release.
Which versions are affected by CVE-2026-89897?
How do I fix CVE-2026-89897?
Apply the vendor's patch.
Is CVE-2026-89897 being exploited?
There is no known exploitation of CVE-2026-89897 in the wild and no public exploit code.
Sources
Also known as AZL-101349, BELL-CVE-2026-89897, DEBIAN-CVE-2026-89897, GHSA-qrqc-48r2-97g7, UBUNTU-CVE-2026-89897.