CVE-2026-68427 gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_mappings
A use-after-free vulnerability in the Linux kernel's host1x GPU driver allows attackers to potentially execute code or escalate privileges.
- 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-2026-68427?
CVE-2026-68427 is a high-severity use after free 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:
gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_mappings
__host1x_bo_unpin() drops the last reference to the mapping and frees it, so we can't dereference mapping afterwards. The cache itself outlives the mapping, so use the cache local variable instead.
Weakness: CWE-416
Which versions are affected by CVE-2026-68427?
How do I fix CVE-2026-68427?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-68427 being exploited?
There is no known exploitation of CVE-2026-68427 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68427, DEBIAN-CVE-2026-68427, GHSA-8v73-w5j7-p4x2, UBUNTU-CVE-2026-68427.