Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all() syzbot is hitting percpu_rwsem_assert_held(&cpu_hotplug_lock) warning at cpuset_attach() [1], for commit 4f7e7236435ca0ab ("cgroup: Fix threadgroup_rwsem <-> cpus_read_lock() deadlock") missed that cpuset_attach() is also called from cgroup_attach_task_all(). Add cpus_read_lock() like what cgroup_procs_write_start() does.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.4.213, < 5.4.215 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/07191f984842d50020789ff14c75da436a7f46a9Patch
- https://git.kernel.org/stable/c/321488cfac7d0eb6d97de467015ff754f85813ffPatch
- https://git.kernel.org/stable/c/43626dade36fa74d3329046f4ae2d7fdefe401c6Patch
- https://git.kernel.org/stable/c/5db17805b6ba4c34dab303f49aea3562fc25af75Patch
- https://git.kernel.org/stable/c/99bc25748e394d17f9e8b10cc7f273b8e64c1c7ePatch
- https://git.kernel.org/stable/c/9f267393b036f1470fb12fb892d59e7ff8aeb58dPatch
- https://git.kernel.org/stable/c/07191f984842d50020789ff14c75da436a7f46a9Patch
- https://git.kernel.org/stable/c/321488cfac7d0eb6d97de467015ff754f85813ffPatch
- https://git.kernel.org/stable/c/43626dade36fa74d3329046f4ae2d7fdefe401c6Patch
- https://git.kernel.org/stable/c/5db17805b6ba4c34dab303f49aea3562fc25af75Patch
- https://git.kernel.org/stable/c/99bc25748e394d17f9e8b10cc7f273b8e64c1c7ePatch
- https://git.kernel.org/stable/c/9f267393b036f1470fb12fb892d59e7ff8aeb58dPatch
FAQ
What is CVE-2022-48671?
CVE-2022-48671 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all() syzbot is hitting percpu_rwsem_assert_held(&cpu_hotplug_lock) war...
How severe is CVE-2022-48671?
CVE-2022-48671 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-48671?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.