CVE-2022-48671mediumCWE-667

cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all()

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 5.5epss 0.2%

exploitation probability

0.2%top 92% of all CVEs

observed exploitation

nono source reports it

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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/07191f984842d50020789ff14c75da436a7f46a9 https://git.kernel.org/stable/c/321488cfac7d0eb6d97de467015ff754f85813ff https://git.kernel.org/stable/c/43626dade36fa74d3329046f4ae2d7fdefe401c6 https://git.kernel.org/stable/c/5db17805b6ba4c34dab303f49aea3562fc25af75 https://git.kernel.org/stable/c/99bc25748e394d17f9e8b10cc7f273b8e64c1c7e https://git.kernel.org/stable/c/9f267393b036f1470fb12fb892d59e7ff8aeb58d