CVE-2021-29256 vulnerability in Arm Products
Published on May 24, 2021
. 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.
Known Exploited Vulnerability
This Arm Mali GPU Kernel Driver Use-After-Free Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. 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.
The following remediation steps are recommended / required by July 28, 2023: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
Vulnerability Analysis
CVE-2021-29256 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2021-29256 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2021-29256
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Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.