CVE-2025-39919 wifi: mt76: mt7996: add missing check for rx wcid entries
A missing check in the mt7996 WiFi driver allows memory corruption via invalid WCID entries, potentially leading to code execution or system crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-39919?
CVE-2025-39919 is a high-severity memory corruption vulnerability in Linux kernel, published on 1 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7996: add missing check for rx wcid entries
Non-station wcid entries must not be passed to the rx functions. In case of the global wcid entry, it could even lead to corruption in the wcid array due to pointer being casted to struct mt7996_sta_link using container_of.
Which versions are affected by CVE-2025-39919?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-39919?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-39919 being exploited?
There is no known exploitation of CVE-2025-39919 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-39919, DEBIAN-CVE-2025-39919, GHSA-92m9-hvpm-8m3c, UBUNTU-CVE-2025-39919.