CVE-2026-23430 drm/vmwgfx: Don't overwrite KMS surface dirty tracker
A memory leak in the vmwgfx driver allows attackers to cause denial of service by overwriting the KMS surface dirty tracker.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-23430?
CVE-2026-23430 is a medium-severity memory corruption vulnerability in Linux kernel, published on 3 Apr 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:
drm/vmwgfx: Don't overwrite KMS surface dirty tracker
We were overwriting the surface's dirty tracker here causing a memory leak.
Weakness: CWE-401
Which versions are affected by CVE-2026-23430?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-23430?
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-2026-23430 being exploited?
There is no known exploitation of CVE-2026-23430 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-23430, DEBIAN-CVE-2026-23430, GHSA-wmvm-658g-ppfx, UBUNTU-CVE-2026-23430.