What’s Vulnerable › Vulnerabilities

CVE-2024-40977: wifi: mt76: mt7921s: fix potential hung tasks during chip recovery

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-12 · updated 2026-06-17
• Weakness: CWE-667

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.

Affected products

• Linux kernel: before 6.1.96; from 6.2 before 6.6.36; from 6.7 before 6.9.7 — fixed in 6.1.96, 6.6.36, 6.9.7

How to fix

Upgrade to a fixed version: Linux kernel 6.1.96, 6.6.36, 6.9.7. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0b81faa05b0b9feb3ae2d69be1d21f0d126ecb08
• https://git.kernel.org/stable/c/85edd783f4539a994d66c4c014d5858f490b7a02
• https://git.kernel.org/stable/c/e974dd4c22a23ec3ce579fb6d31a674ac0435da9
• https://git.kernel.org/stable/c/ecf0b2b8a37c8464186620bef37812a117ff6366
• https://git.kernel.org/stable/c/0b81faa05b0b9feb3ae2d69be1d21f0d126ecb08
• https://git.kernel.org/stable/c/85edd783f4539a994d66c4c014d5858f490b7a02
• https://git.kernel.org/stable/c/e974dd4c22a23ec3ce579fb6d31a674ac0435da9
• https://git.kernel.org/stable/c/ecf0b2b8a37c8464186620bef37812a117ff6366
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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