CVE-2021-29256 Explained : Impact and Mitigation
Arm Mali GPU kernel driver vulnerability in CVE-2021-29256 allows unauthorized access to freed memory, leading to information disclosure or root privilege escalation. Learn about impacts, affected versions, and mitigation steps.
The Arm Mali GPU kernel driver vulnerability with CVE-2021-29256 allows an unprivileged user to access freed memory, potentially leading to information disclosure or root privilege escalation. This impacts Bifrost, Valhall, and Midgard versions before certain releases.
Understanding CVE-2021-29256
This vulnerability involves unauthorized access to sensitive memory areas, posing risks of data exposure and unauthorized system control.
What is CVE-2021-29256?
The Arm Mali GPU kernel driver vulnerability enables unauthorized users to gain access to released memory, risking data leaks or unauthorized system control.
The Impact of CVE-2021-29256
The vulnerability poses severe security risks by allowing unauthorized users to exploit freed memory regions, potentially leading to data breaches or system hijacking.
Technical Details of CVE-2021-29256
The vulnerability affects specific versions of Arm's Bifrost, Valhall, and Midgard GPU architectures before certain updates.
Vulnerability Description
The flaw enables unprivileged users to access released memory, potentially leading to confidential data exposure or unauthorized system manipulation.
Affected Systems and Versions
Arm's Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0 versions are susceptible to this vulnerability.
Exploitation Mechanism
Attackers exploit this vulnerability to access freed memory regions, which may contain sensitive information, allowing them to potentially escalate their privileges or exfiltrate data.
Mitigation and Prevention
To safeguard systems from CVE-2021-29256, immediate action and long-term security measures are essential.
Immediate Steps to Take
Apply relevant security patches and updates provided by Arm to mitigate the vulnerability and enhance system protection.
Long-Term Security Practices
Implement comprehensive security protocols, restrict user privileges, and monitor system behavior to prevent unauthorized access and data breaches.
Patching and Updates
Regularly check for security updates from Arm and promptly apply patches to eliminate vulnerabilities and enhance system security.