CVE-2021-29256

arm bifrost gpu kernel driver, arm midgard gpu kernel driver, arm valhall gpu kernel driver

Published 24 May 2021 · updated 17 Jun 2026 · Analyzed

8.8 High · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 7 Jul 2023, with a remediation deadline of 28 Jul 2023 for US federal agencies.

Required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

Description

. 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.

References

developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver · Vendor Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-29256 · US Government Resource