CVE-2021-29256
Published: July 7, 2023
Official 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.
CISA KEV Advisory
Arm Mali GPU Kernel Driver Use-After-Free Vulnerability
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.
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
Risk Analysis
This use-after-free vulnerability in Arm Mali GPU Kernel Driver could allow a non-privileged user to gain root privileges or disclose sensitive information. Its presence in CISA's KEV and active exploitation in the wild make it a high-priority concern.
This vulnerability is actively being exploited in the wild, as confirmed by its inclusion in CISA's KEV. Exploitation requires local access to the affected system.
Apply the latest security updates for Arm Mali GPU Kernel Driver to mitigate the use-after-free vulnerability. Regular patching of kernel drivers is essential for system security.
Technical Analysis
CVE-2021-29256 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2021-29256 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-29256 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1