CVE-2026-20474 Race condition in MediaTek chipset

Medium 6.0 Published 3 Aug 2026 Updated 5 Aug 2026

A race condition in MediaTek display components allows local privilege escalation for attackers with System privileges.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2026-20474?

CVE-2026-20474 is a medium-severity vulnerability in MediaTek, Inc. MediaTek chipset, published on 3 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In display, there is a possible escalation of privilege due to a race condition. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11019183; Issue ID: MSV-7758.

Weakness: CWE-367

Which versions are affected by CVE-2026-20474?

It affects 17 products.

Products include Mediatek Mt6991 Firmware, Mediatek Mt6993 Firmware, Mediatek Mt8126 Firmware, Mediatek Mt8171 Firmware, Mediatek Mt8188 Firmware, Mediatek Mt8189 Firmware and 11 more.

How do I fix CVE-2026-20474?

Apply the vendor's patch.

Is CVE-2026-20474 being exploited?

There is no known exploitation of CVE-2026-20474 in the wild and no public exploit code.

Sources

Also known as A-518601920, ASB-A-518601920, GHSA-mx2w-3qf4-9ffq, M-ALPS11019183.