---
id: "CVE-2021-28664"
kind: "vulnerability"
aliases: ["CVE-2021-28664"]
title: "Arm Mali Graphics Processing Unit (GPU): Arm Mali Graphics Processing Unit (GPU) Unspecified Vulnerability"
severity: "critical"
cvss: 9.0
epss: 0.05407
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Arm Mali Graphics Processing Unit (GPU)", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["android", "arm-mali", "embedded-linux", "exploited", "infrastructure"]
not_affected_if: ["driver-patched", "no-mali-gpu"]
published_at: "2021-05-10T15:15:07+00:00"
first_seen_at: "2026-10-23T19:11:53+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-28664", "first_seen_at": "2026-10-23T19:11:53+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-28664", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28664", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Arm Mali Graphics Processing Unit (GPU): Arm Mali Graphics Processing Unit (GPU) Unspecified Vulnerability

The Arm Mali GPU kernel driver has an unspecified flaw that lets a non-privileged local user write to read-only memory and gain root. It is listed in CISA's Known Exploited Vulnerabilities catalog, so attacks have been observed in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Arm Mali Graphics Processing Unit (GPU) affected ? fixed ?

## Fix

Apply the updates per the vendor instructions from Arm; the sources do not name the fixed driver version.

## Timeline

- 2026-10-23T19:11:53+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-28664
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2021-28664
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2021-28664

## From the sources

The Arm Mali GPU kernel driver allows privilege escalation or a denial of service (memory corruption) because an unprivileged user can achieve read/write access to read-only pages. This affects Bifrost r0p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r8p0 through r30p0 before r31p0.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_