Is CVE-2021-28663 actively exploited?

CVE-2021-28663 has no public evidence of in-the-wild exploitation as of 2025-11-03.

What is the CVSS score for CVE-2021-28663?

CVE-2021-28663 has a CVSS score of 8.8 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2021-28663?

Patch guidance is available from arm security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-28663.

Fix CVE-2021-28663 - HIGH arm bifrost gpu kernel driver

Q: Which products are affected by CVE-2021-28663?

3 products: arm bifrost gpu kernel driver, arm midgard gpu kernel driver, arm valhall gpu kernel driver.

Description

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-416 · Use After Free CWE-416 · Use After Free

Metadata

Primary Vendor: ARM
Published: 5/10/2021
Last Modified: 11/3/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

arm : bifrost_gpu_kernel_driverarm : midgard_gpu_kernel_driverarm : valhall_gpu_kernel_driver

Remediation Guidance

Executive Summary

View on NIST NVD