CVE-2021-29256

· HIGHAnalyzed

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CVSS v3.1

8.8

EPSS

3.02%

Published

May 24, 2021

Modified

Nov 3, 2025

CISA Known Exploited Vulnerability

Added: 2023-07-07 · Due: 2023-07-28

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

Public PoC / Exploit (1)

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Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-416CWE-416

Affected Products (3)

arm · bifrost_gpu_kernel_driver (up to r30p0)vulnerable

arm · midgard_gpu_kernel_driver (up to r31p0)vulnerable

arm · valhall_gpu_kernel_driver (up to r30p0)vulnerable

References (3)

https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver

Vendor Advisory

https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver

Vendor Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-29256

US Government Resource

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