CVE-2025-20677 Null dereference in MT7902, MT7921, MT7922, MT7925, MT7927

Medium 5.5 Published 2 Jun 2025 Updated 3 Jun 2025

A local attacker can cause a system crash in MediaTek Bluetooth drivers via an uncaught exception, requiring user execution privileges but no interaction.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-20677?

CVE-2025-20677 is a medium-severity vulnerability in MediaTek, Inc. MT7902, MT7921, MT7922, MT7925, MT7927, published on 2 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In Bluetooth driver, there is a possible system crash due to an uncaught exception. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00412256; Issue ID: MSV-3284.

Weakness: CWE-476

Which versions are affected by CVE-2025-20677?

It affects 1 product.

Products include Mediatek Nbiot Sdk.

How do I fix CVE-2025-20677?

No fix has been published for CVE-2025-20677 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-20677 being exploited?

There is no known exploitation of CVE-2025-20677 in the wild and no public exploit code.

Sources

Also known as GHSA-hx4r-v9cq-h9mg.