CVE-2021-29256: Arm Mali GPU Kernel Driver Use-After-Free Vulnerability
CVE-2021-29256 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2023-07-07
The Arm Mali GPU kernel driver contains a use-after-free vulnerability that allows an unprivileged user to access freed memory. This flaw can be exploited to achieve information disclosure or escalate privileges to root.
Yes. CVE-2021-29256 is known to be exploited in the wild, first recorded on 7 July 2023. Treat it as urgent.
How severe is CVE-2021-29256?
Critical severity, with a CVSS score of 8.8, published 7 July 2023.
Which products and versions are affected?
Arm Bifrost GPU Kernel Driver r16p0 through r29p0 before r30p0; Arm Valhall GPU Kernel Driver r19p0 through r29p0 before r30p0; Arm Midgard GPU Kernel Driver r28p0 through r30p0.
Is there a fix for CVE-2021-29256?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-29256 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2021-29256?
Check whether you run Arm Mali Graphics Processing Unit (GPU). Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Arm Bifrost GPU Kernel Driver r16p0 through r29p0 before r30p0
Arm Valhall GPU Kernel Driver r19p0 through r29p0 before r30p0
Arm Midgard GPU Kernel Driver r28p0 through r30p0
Timeline
2021-05-24: disclosed: NVD Published Date
2023-07-07: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
2023-07-07: exploited: Reported as exploited in the wild in advisory metadata