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

> CVE-2021-29256: Arm Mali GPU Kernel Driver Use-After-Free Vulnerability. CVSS 8.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2021-29256
Last updated: 2025-10-21T23:25:45Z

- Published: 2021-05-24 17:56 UTC · Updated: 2025-10-21 23:25 UTC · Assigner: mitre
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 3.0%, 87th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2023-07-07, federal due date 2023-07-28, ransomware use: Unknown

## 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.

## CISA required action

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

## Affected vendors and products

- Arm: Mali Graphics Processing Unit (GPU)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-29256)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2021-29256)
- [https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver](https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2021-29256 · Markdown: https://rewindex.com/cve/CVE-2021-29256.md · JSON: https://rewindex.com/api/v1/cves/CVE-2021-29256 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:42.805Z