Arm Mali GPU Kernel Driver 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-2021-29256

• Recommended remediation

  Apply updates per vendor instructions or discontinue use of the product if updates are unavailable. CISA due date Jul 28, 2023.

• 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 24, 2021 · Catalog

   Detected

   . 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.

2. Jul 7, 2023 · CISA KEV

   Known exploited

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

3. Jul 28, 2023 · CISA KEV

   Remediation due

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

4. Jun 16, 2026 · Catalog

   Updated

   . 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.

Sources

• CISA KEVConfirmed exploitationCVE-2021-29256

  Arm Mali GPU Kernel Driver contains a use-after-free vulnerability that may allow a non-privileged user to gain root privilege and/or disclose information.

  cisa.gov
• CVE.orgVulnerability recordCVE-2021-29256

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2021-29256

  30-day exploitation probability 3.0%

  first.org
• NIST NVDVulnerability recordCVE-2021-29256

  . 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 throu

  nvd.nist.gov
• VulnCheck KEVConfirmed exploitationCVE-2021-29256

  Arm Mali GPU Kernel Driver contains a use-after-free vulnerability that may allow a non-privileged user to gain root privilege and/or disclose information.

  vulncheck.com

References

• CISA note · developer.arm.com
• Vendor Advisory · developer.arm.com
• CISA note · nvd.nist.gov
• VulnCheck exploitation evidence · source.android.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.