CVE-2024-42245

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to a vulnerability in the Linux kernel's fair scheduling component, which can cause hard lockups due to an O(n) iteration in detach tasks(). This occurs when the load balance code is done with the rq lock held and often in softirq context. The problem was introduced by a patch that changed the load balancing logic to ignore env.max loop if all tasks examined were pinned, aiming to detach a task buried in a long list of pinned tasks. However, this patch has been reverted as it seems likely no one was actually getting hit by the original issue. Hard lockups were observed with a user who affined O(10k) threads to a single CPU.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.