CVE-2026-20473 Use after free in MediaTek chipset

Medium 6.0 Published 3 Aug 2026 Updated 5 Aug 2026

A use-after-free vulnerability 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-2026-20473?

CVE-2026-20473 is a medium-severity use after free 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 memory corruption due to use after free. 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: ALPS11019722; Issue ID: MSV-7759.

Weakness: CWE-416

Which versions are affected by CVE-2026-20473?

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-2026-20473?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2026-20473 being exploited?

There is no known exploitation of CVE-2026-20473 in the wild and no public exploit code.

Sources

Also known as A-518610752, ASB-A-518610752, GHSA-23j5-3m4p-44jj, M-ALPS11019722.