CVE-2026-46136 wifi: mt76: mt7921: fix a potential clc buffer length underflow
An integer underflow in the mt7921 WiFi driver can cause an infinite loop or initialization failure, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46136?
CVE-2026-46136 is a high-severity vulnerability in Linux kernel, published on 28 May 2026. 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: mt7921: fix a potential clc buffer length underflow
The buf_len is used to limit the iterations for retrieving the country power setting and may underflow under certain conditions due to changes in the power table in CLC.
This underflow leads to an almost infinite loop or an invalid power setting resulting in driver initialization failure.
Weakness: CWE-787
Which versions are affected by CVE-2026-46136?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46136?
Apply the vendor's patch.
Is CVE-2026-46136 being exploited?
There is no known exploitation of CVE-2026-46136 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-88857, BELL-CVE-2026-46136, DEBIAN-CVE-2026-46136, GHSA-jm55-4g4j-2rgw, ROOT-OS-DEBIAN-12-CVE-2026-46136, ROOT-OS-UBUNTU-2404-CVE-2026-46136 and 1 more.