Use After Free in Arm Bifrost_gpu_kernel_driver

CVE-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 r2…

Vulnerability class: Use-After-Free

EPSS: 0.030 (86.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: .

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

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-29256?
CVE-2021-29256 is a high-severity vulnerability in Arm Bifrost_gpu_kernel_driver, classified under Use After Free. CVSS score: 8.8/10. Published 2021-05-24.
How severe is CVE-2021-29256?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-29256 known to be exploited?
Yes. CVE-2021-29256 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-07-07), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.