CVE-2021-29256: Arm Mali GPU Kernel Driver Use-After-Free Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2023-07-07. EPSS: 3% chance of exploitation in the next 30 days.

. The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege escalation. This affects Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0.

Affected products

• Arm Bifrost GPU Kernel Driver: from r16p0, before r30p0 (fixed in r30p0)
• Arm Midgard GPU Kernel Driver: from r28p0, before r31p0 (fixed in r31p0)
• Arm Valhall GPU Kernel Driver: from r19p0, before r30p0 (fixed in r30p0)

Published 2021-05-24. Last modified 2026-06-17.