Arm Mali Graphics Processing Unit (GPU) Use-After-Free Vulnerability

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• cpe arm/bifrost gpu kernel driverversion unspecified
• cpe arm/midgard gpu kernel driverversion unspecified
• cpe arm/valhall gpu kernel driverversion unspecified
• vendor Arm Mali Graphics Processing Unit (GPU)version unspecified

How to fix CVE-2021-28663

• Recommended remediation

  Apply updates per vendor instructions. CISA due date Nov 17, 2021.

• Official advisories

  • CISA KEV · cisa.gov
  • CVE.org · cve.org
  • FIRST EPSS · first.org
  • NIST NVD · nvd.nist.gov
  • VulnCheck KEV · vulncheck.com

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. May 10, 2021 · Catalog

   Detected

   The Arm Mali GPU kernel driver allows privilege escalation or information disclosure because GPU memory operations are mishandled, leading to a use-after-free. This affects Bifrost r0p0 through r28p0 before r29p0, Valhall r19p0 through r28p0 before r29p0, and Midgard r4p0 through r30p0.

2. Nov 3, 2021 · CISA KEV

   Known exploited

   Apply updates per vendor instructions.

3. Nov 17, 2021 · CISA KEV

   Remediation due

   Apply updates per vendor instructions.

4. Jun 16, 2026 · Catalog

   Updated

   The Arm Mali GPU kernel driver allows privilege escalation or information disclosure because GPU memory operations are mishandled, leading to a use-after-free. This affects Bifrost r0p0 through r28p0 before r29p0, Valhall r19p0 through r28p0 before r29p0, and Midgard r4p0 through r30p0.

Sources

• CISA KEVConfirmed exploitationCVE-2021-28663

  Arm Mali Graphics Processing Unit (GPU) kernel driver contains a use-after-free vulnerability that may allow a non-privileged user to make improper operations on GPU memory to gain root privilege, and/or disclose information.

  cisa.gov
• CVE.orgVulnerability recordCVE-2021-28663

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2021-28663

  30-day exploitation probability 12.1%

  first.org
• NIST NVDVulnerability recordCVE-2021-28663

  The Arm Mali GPU kernel driver allows privilege escalation or information disclosure because GPU memory operations are mishandled, leading to a use-after-free. This affects Bifrost r0p0 through r28p0 before r29p0, Valhall r19p0 through r28p0 before r29p0, and Midgard r4p0 through

  nvd.nist.gov
• VulnCheck KEVConfirmed exploitationCVE-2021-28663

  Arm Mali Graphics Processing Unit (GPU) kernel driver contains a use-after-free vulnerability that may allow a non-privileged user to make improper operations on GPU memory to gain root privilege, and/or disclose information.

  vulncheck.com

References

• Vendor Advisory · developer.arm.com
• Vendor Advisory · developer.arm.com
• VulnCheck exploitation evidence · docs.google.com
• Exploit · github.com
• CISA note · nvd.nist.gov
• VulnCheck exploitation evidence · storage.googleapis.com
• US Government Resource · cisa.gov
• VulnCheck exploitation evidence · cisa.gov

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.