CVE-2026-74393 drm/syncobj: Fix memory leak in drm_syncobj_find_fence()
A memory leak in the Linux kernel's DRM syncobj subsystem allows local attackers to exhaust system memory, causing denial of service.
- 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-2026-74393?
CVE-2026-74393 is a memory corruption vulnerability in Linux, published on 15 Aug 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/syncobj: Fix memory leak in drm_syncobj_find_fence()
Commit 18226ba52159 ("drm/syncobj: reject invalid flags in drm_syncobj_find_fence") forgot to take into account the fact that drm_syncobj_find() takes a reference to syncobj and returns early without dropping the reference, leading to memory leaks.
Reported by: Sam Spencer <[email protected]>
Which versions are affected by CVE-2026-74393?
How do I fix CVE-2026-74393?
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-2026-74393 being exploited?
There is no known exploitation of CVE-2026-74393 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74393, DEBIAN-CVE-2026-74393, GHSA-h8w2-mjc7-282f, UBUNTU-CVE-2026-74393.