CVE-2021-29256
Arm Mali GPU Kernel Driver Use-After-Free Vulnerability
- High 8.8
- Exploited: added to CISA KEV 7 Jul 2023
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.
Key facts
- Published
- 24 May 2021
- Last changed
- 21 Oct 2025
- Assigned by
- mitre
- KEV added
- 7 Jul 2023
- KEV fix due
- 28 Jul 2023
- EPSS
- 2.988% likely to be exploited in the next 30 days, higher than 87.529% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 8.8CVSS 3.1, Highfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a |
|
Timeline
- 24 May 2021 Published
- 7 Jul 2023 CVE-2021-29256 added to CISA KEV
- 7 Jul 2023 Added to the CISA KEV catalogue