CVE-2024-40977: wifi: mt76: mt7921s: fix potential hung tasks during chip recovery
First published: Fri Jul 12 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.1.96 | 6.1.96 |
| redhat/kernel | <6.6.36 | 6.6.36 |
| redhat/kernel | <6.9.7 | 6.9.7 |
| redhat/kernel | <6.10 | 6.10 |
| Linux kernel | <6.1.96 | |
| Linux kernel | >=6.2<6.6.36 | |
| Linux kernel | >=6.7<6.9.7 | |
| Linux Kernel | <6.1.96 | |
| Linux Kernel | >=6.2<6.6.36 | |
| Linux Kernel | >=6.7<6.9.7 | |
| IBM Security Verify Governance - Identity Manager | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Software Stack | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Virtual Appliance | <=ISVG 10.0.2 | |
| IBM Security Verify Governance Identity Manager Container | <=ISVG 10.0.2 | |
| debian/linux | <=5.10.223-1<=5.10.234-1 | 6.1.129-1 6.1.128-1 6.12.21-1 6.12.22-1 |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- https://access.redhat.com/errata/RHSA-2024:7001
- https://access.redhat.com/errata/RHSA-2024:7000
- https://access.redhat.com/errata/RHSA-2024:8617
- https://bugzilla.redhat.com/show_bug.cgi?id=2297561
- 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://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-40977
- https://nvd.nist.gov/vuln/detail/CVE-2024-40977
- https://launchpad.net/bugs/cve/CVE-2024-40977
- https://security-tracker.debian.org/tracker/CVE-2024-40977
- https://ubuntu.com/security/CVE-2024-40977
- https://git.kernel.org/linus/ecf0b2b8a37c8464186620bef37812a117ff6366
- https://www.ibm.com/support/pages/node/7230443 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2024-40977?
CVE-2024-40977 has been classified with a moderate severity level due to potential risks during chip recovery in the Linux kernel.
How do I fix CVE-2024-40977?
To fix CVE-2024-40977, update your kernel to versions 6.1.96, 6.6.36, 6.9.7, or a later fixed version.
What systems are affected by CVE-2024-40977?
CVE-2024-40977 affects several versions of the Linux kernel across various distributions, including Red Hat and Debian.
What are the symptoms of CVE-2024-40977?
Symptoms of CVE-2024-40977 may include hung tasks during chip recovery operations in systems using affected kernel versions.
Is there a workaround for CVE-2024-40977?
Currently, the most reliable approach to mitigateg CVE-2024-40977 is to apply the recommended kernel updates as soon as possible.
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