CVE-2024-41932

Description

In the Linux kernel, the following vulnerability has been resolved: sched: fix warning in sched_setaffinity Commit 8f9ea86fdf99b added some logic to sched_setaffinity that included a WARN when a per-task affinity assignment races with a cpuset update. Specifically, we can have a race where a cpuset update results in the task affinity no longer being a subset of the cpuset. That's fine; we have a fallback to instead use the cpuset mask. However, we have a WARN set up that will trigger if the cpuset mask has no overlap at all with the requested task affinity. This shouldn't be a warning condition; its trivial to create this condition. Reproduced the warning by the following setup: - $PID inside a cpuset cgroup - another thread repeatedly switching the cpuset cpus from 1-2 to just 1 - another thread repeatedly setting the $PID affinity (via taskset) to 2

CVSS Metrics

• v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 1%

Affected Systems

• linux•linux

  ≥ 8f9ea86fdf99b81458cc21fc1c591fcd4a0fa1f4, < 5c3fb75f538cfcb886f6dfeb497d99fc2f263ee6 | ≥ 8f9ea86fdf99b81458cc21fc1c591fcd4a0fa1f4, < 70ee7947a29029736a1a06c73a48ff37674a851b | 6.2

• linux•linux_kernel

  ≥ 6.2, < 6.12.5 | 6.13:rc1 | 6.13:rc2

References (2)

• https://git.kernel.org/stable/c/5c3fb75f538cfcb886f6dfeb497d99fc2f263ee6
• https://git.kernel.org/stable/c/70ee7947a29029736a1a06c73a48ff37674a851b