CVE-2026-68243 drm/i915/gem: Fix NULL deref in I915_CONTEXT_PARAM_SSEU
A local attacker can cause a kernel crash by triggering a NULL pointer dereference in the Intel i915 graphics driver via specific context parameter settings.
- 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-2026-68243?
CVE-2026-68243 is a vulnerability in Linux, published on 10 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/i915/gem: Fix NULL deref in I915_CONTEXT_PARAM_SSEU
Setting context engine slot N into I915_ENGINE_CLASS_INVALID / I915_ENGINE_CLASS_INVALID_NONE and attempting to apply I915_CONTEXT_PARAM_SSEU to the same slot N will deref NULL. Fix that.
Discovered using AI-assisted static analysis confirmed by Intel Product Security.
(cherry picked from commit 36eda5b5c2d40da41cc0a5403c26986237cf9e87)
Which versions are affected by CVE-2026-68243?
How do I fix CVE-2026-68243?
Apply the vendor's patch.
Is CVE-2026-68243 being exploited?
There is no known exploitation of CVE-2026-68243 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68243, DEBIAN-CVE-2026-68243, GHSA-4mq5-r47h-v52v, UBUNTU-CVE-2026-68243.