Arm Mali GPU Kernel Driver Use-After-Free Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2023-03-30
• EPSS: 18% chance of exploitation in the next 30 days (higher than 97% of CVEs)

[ Description ]Official description

The Arm Mali GPU kernel driver allows unprivileged users to access freed memory because GPU memory operations are mishandled. This affects Bifrost r0p0 through r38p1, and r39p0; Valhall r19p0 through r38p1, and r39p0; and Midgard r4p0 through r32p0.

CISA: 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.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 20 Apr 2023): Apply updates per vendor instructions.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• packetstormsecurity.com/files/172854/Android-Arm-Mali-GPU-Arbitrary-Code-Execution.htmlThird Party AdvisoryVDB Entry
• developer.arm.com/Arm%20Security%20Center/Mali%20GPU%20Driver%20VulnerabilitiesVendor Advisory
• developer.arm.com/support/arm-security-updatesVendor Advisory
• github.blog/2023-01-23-pwning-the-all-google-phone-with-a-non-google-bugExploitThird Party Advisory
• securitylab.github.com/advisories/GHSL-2022-054_Arm_MaliExploitThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource