. 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.
Published 2021-05-24 18:15:08
Updated 2022-03-22 15:00:45
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Gain privilegeInformation leak

CVE-2021-29256 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Arm Mali GPU Kernel Driver Use-After-Free Vulnerability
CISA required action:
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
CISA description:
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.
Notes:
https://developer.arm.com/Arm%20Security%20Center/Mali%20GPU%20Driver%20Vulnerabilities
Added on 2023-07-07 Action due date 2023-07-28

Exploit prediction scoring system (EPSS) score for CVE-2021-29256

2.48%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 90 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-29256

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
9.0
HIGH AV:N/AC:L/Au:S/C:C/I:C/A:C
8.0
10.0
NIST
8.8
HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.8
5.9
NIST

CWE ids for CVE-2021-29256

  • Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-29256

Products affected by CVE-2021-29256

  • ARM » Bifrost
    Versions from including (>=) r16p0-01eac0 and before (<) r30p0-01eac0
    cpe:2.3:a:arm:bifrost:*:*:*:*:*:*:*:*
  • ARM » Valhall
    Versions from including (>=) r19p0-01eac0 and before (<) r30p0-01eac0
    cpe:2.3:a:arm:valhall:*:*:*:*:*:*:*:*
  • ARM » Midgard
    Versions from including (>=) r28p0-01eac0 and up to, including, (<=) r30p0-01eac0
    cpe:2.3:a:arm:midgard:*:*:*:*:*:*:*:*
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