CVE-2026-89898 media: cec: extron-da-hd-4k-plus: add sanity check
A missing sanity check in the Extron DA-HD-4K-Plus CEC driver allows malformed data to overflow a buffer, potentially leading to code execution or system crash.
- 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-2026-89898?
CVE-2026-89898 is a high-severity memory corruption 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: extron-da-hd-4k-plus: add sanity check
Add check to prevent overflowing msg.msg[] in case the incoming data is malformed.
Which versions are affected by CVE-2026-89898?
How do I fix CVE-2026-89898?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-89898 being exploited?
There is no known exploitation of CVE-2026-89898 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-89898, DEBIAN-CVE-2026-89898, GHSA-f232-pgf4-w544, UBUNTU-CVE-2026-89898.