arm bifrost-gpu-kernel-driver CVE-2021-28663 vulnerability in Arm Products
Published on May 10, 2021

The Arm Mali GPU kernel driver allows privilege escalation or information disclosure because GPU memory operations are mishandled, leading to a use-after-free. This affects Bifrost r0p0 through r28p0 before r29p0, Valhall r19p0 through r28p0 before r29p0, and Midgard r4p0 through r30p0.

Vendor Advisory Vendor Advisory NVD

Known Exploited Vulnerability

This Arm Mali GPU Kernel Use-After-Free Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. The Arm Mali GPU kernel driver allows privilege escalation or information disclosure because GPU memory operations are mishandled, leading to a use-after-free. This affects Bifrost r0p0 through r28p0 before r29p0, Valhall r19p0 through r28p0 before r29p0, and Midgard r4p0 through r30p0.

The following remediation steps are recommended / required by November 17, 2021: Apply updates per vendor instructions.

Vulnerability Analysis

CVE-2021-28663 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 2.8 out of four. The potential impact of an exploit of this vulnerability is considered to be very high.

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-2021-28663 has been classified to as a Dangling pointer vulnerability or weakness.


Products Associated with CVE-2021-28663

You can be notified by stack.watch whenever vulnerabilities like CVE-2021-28663 are published in these products:

Arm Bifrost Gpu Kernel Driver
 
Arm Midguard Gpu Kernel Driver
 
Arm Valhall Gpu Kernel Driver
 
Arm Midgard Gpu Kernel Driver
 

What versions are vulnerable to CVE-2021-28663?