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CVE-2023-5643: Mali GPU Kernel Driver allows improper GPU memory processing operations

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-05 · updated 2026-06-17
• Weakness: CWE-787

Description

Out-of-bounds Write vulnerability in Arm Ltd Bifrost GPU Kernel Driver, Arm Ltd Valhall GPU Kernel Driver, Arm Ltd Arm 5th Gen GPU Architecture Kernel Driver allows a local non-privileged user to make improper GPU memory processing operations. Depending on the configuration of the Mali GPU Kernel Driver, and if the system’s memory is carefully prepared by the user, then this in turn could write to memory outside of buffer bounds.This issue affects Bifrost GPU Kernel Driver: from r41p0 through r45p0; Valhall GPU Kernel Driver: from r41p0 through r45p0; Arm 5th Gen GPU Architecture Kernel Driver: from r41p0 through r45p0.

Affected products

• Arm Ltd Arm 5th Gen GPU Architecture Kernel Driver: from r41p0 before r46p0 — fixed in r46p0
• Arm Ltd Bifrost GPU Kernel Driver: from r41p0 before r46p0 — fixed in r46p0
• Arm Ltd Valhall GPU Kernel Driver: from r41p0 before r46p0 — fixed in r46p0

How to fix

Upgrade to a fixed version: Arm Ltd Arm 5th Gen GPU Architecture Kernel Driver r46p0; Arm Ltd Bifrost GPU Kernel Driver r46p0; Arm Ltd Valhall GPU Kernel Driver r46p0. Check the vendor advisory for mitigations.

References

• https://developer.arm.com/Arm%20Security%20Center/Mali%20GPU%20Driver%20Vulnerabilities
• https://developer.arm.com/Arm%20Security%20Center/Mali%20GPU%20Driver%20Vulnerabilities

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