CVE-2022-49129 mt76: mt7921: fix crash when startup fails.
A use-after-free vulnerability in the mt7921 Wi-Fi driver allows a local attacker to cause a system crash when the device fails to start.
- 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-2022-49129?
CVE-2022-49129 is a high-severity use after free vulnerability in Linux kernel, published on 26 Feb 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:
mt76: mt7921: fix crash when startup fails.
If the nic fails to start, it is possible that the reset_work has already been scheduled. Ensure the work item is canceled so we do not have use-after-free crash in case cleanup is called before the work item is executed.
This fixes crash on my x86_64 apu2 when mt7921k radio fails to work. Radio still fails, but OS does not crash.
Weakness: CWE-416
Which versions are affected by CVE-2022-49129?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49129?
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-2022-49129 being exploited?
There is no known exploitation of CVE-2022-49129 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49129, GHSA-r426-g4w9-x3q5, ROOT-OS-DEBIAN-11-CVE-2022-49129, UBUNTU-CVE-2022-49129.