CVE-2026-74451 drm/panthor: validate firmware interface structure sizes
A missing size validation in the Panthor GPU driver allows out-of-bounds memory access, potentially leading to code execution or privilege escalation.
- 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-2026-74451?
CVE-2026-74451 is a high-severity 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/panthor: validate firmware interface structure sizes
iface_fw_to_cpu_addr() only checks that the firmware-provided MCU virtual address points inside the shared section. The returned pointer is later used as a full firmware interface structure, so accepting an address near the end of the shared section can still lead to out-of-bounds accesses.
Pass the expected object size to iface_fw_to_cpu_addr() and reject ranges that do not fit entirely in the shared section.
Which versions are affected by CVE-2026-74451?
How do I fix CVE-2026-74451?
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-2026-74451 being exploited?
There is no known exploitation of CVE-2026-74451 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74451, DEBIAN-CVE-2026-74451, GHSA-hm75-jr86-gwf9, UBUNTU-CVE-2026-74451.