Executive brief
A memory safety flaw exists in Arm's GPU kernel drivers used in graphics processing on mobile and embedded systems. A local attacker with no special privileges can manipulate GPU operations to access memory that has already been freed, potentially enabling data theft, system crashes, or privilege escalation on affected devices.
Technical details
This is a use-after-free vulnerability in Arm's Valhall GPU Kernel Driver and Arm 5th Gen GPU Architecture Kernel Driver. A local, non-privileged user process can perform crafted GPU processing operations to trigger access to freed memory regions. The vulnerability exists in versions r50p0 through r54p3 and r55p0 of both drivers. An attacker must have local access to submit GPU commands but requires no elevated privileges. Successful exploitation may lead to information disclosure, denial of service, or potentially arbitrary code execution within the GPU context.
Affected products
- Arm Valhall GPU Kernel Driver r50p0 through r54p3, r55p0
- Arm 5th Gen GPU Architecture Kernel Driver r50p0 through r54p3, r55p0
Timeline
- 2026-09-08: disclosed