CVE-2024-40977 wifi: mt76: mt7921s: fix potential hung tasks during chip recovery
A deadlock in the mt7921s Wi-Fi driver during chip recovery can cause hung tasks and potential device reboots, requiring a kernel patch.
- 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-2024-40977?
CVE-2024-40977 is a medium-severity vulnerability in Linux kernel, published on 12 Jul 2024. 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: mt7921s: fix potential hung tasks during chip recovery
During chip recovery (e.g. chip reset), there is a possible situation that kernel worker reset_work is holding the lock and waiting for kernel thread stat_worker to be parked, while stat_worker is waiting for the release of the same lock. It causes a deadlock resulting in the dumping of hung tasks messages and possible rebooting of the device.
This patch prevents the execution of stat_worker during the chip recovery.
Weakness: CWE-667
Which versions are affected by CVE-2024-40977?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-40977?
Apply the vendor's patch.
Is CVE-2024-40977 being exploited?
There is no known exploitation of CVE-2024-40977 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-48942, BELL-CVE-2024-40977, DEBIAN-CVE-2024-40977, GHSA-r7xw-j6rq-f93p, ROOT-OS-DEBIAN-11-CVE-2024-40977, ROOT-OS-UBUNTU-2204-CVE-2024-40977 and 1 more.