CVE-2026-20486 Denial of service in MediaTek chipset

Medium 6.7 Published 3 Aug 2026 Updated 5 Aug 2026

A local attacker with System privileges can cause an application crash in the imgsensor component, potentially leading to privilege escalation.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-20486?

CVE-2026-20486 is a medium-severity denial of service 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 imgsensor, there is a possible application crash due to incorrect error handling. 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: ALPS11012302; Issue ID: MSV-7833.

Weakness: CWE-754

Which versions are affected by CVE-2026-20486?

It affects 11 products.

Products include Mediatek Mt2718 Firmware, Mediatek Mt6878 Firmware, Mediatek Mt6895 Firmware, Mediatek Mt6991 Firmware, Mediatek Mt6993 Firmware, Mediatek Mt8370 Firmware and 5 more.

How do I fix CVE-2026-20486?

No fix has been published for CVE-2026-20486 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-20486 being exploited?

There is no known exploitation of CVE-2026-20486 in the wild and no public exploit code.

Sources

Also known as GHSA-g7m9-j98f-r923.