{"timestamp":"2024-09-10T16:13:35.095987Z","id":"CVE-2024-42245","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["kernel/sched/fair.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"b0defa7ae03ecf91b8bfd10ede430cff12fcbd06","lessThan":"d467194018dd536fe6c65a2fd3aedfcdb1424903","versionType":"git","status":"affected"},{"version":"b0defa7ae03ecf91b8bfd10ede430cff12fcbd06","lessThan":"1e116c18e32b035a2d1bd460800072c8bf96bc44","versionType":"git","status":"affected"},{"version":"b0defa7ae03ecf91b8bfd10ede430cff12fcbd06","lessThan":"0fa6dcbfa2e2b97c1e6febbea561badf0931a38b","versionType":"git","status":"affected"},{"version":"b0defa7ae03ecf91b8bfd10ede430cff12fcbd06","lessThan":"2feab2492deb2f14f9675dd6388e9e2bf669c27a","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["kernel/sched/fair.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.1","status":"affected"},{"version":"0","lessThan":"6.1","versionType":"semver","status":"unaffected"},{"version":"6.1.100","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.41","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.9.10","lessThanOrEqual":"6.9.*","versionType":"semver","status":"unaffected"},{"version":"6.10","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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

NIST CWE-667

OR
     *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.1 up to (excluding) 6.1.100
     *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.41
     *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.9.10

https://git.kernel.org/stable/c/0fa6dcbfa2e2b97c1e6febbea561badf0931a38b No Types Assigned

https://git.kernel.org/stable/c/0fa6dcbfa2e2b97c1e6febbea561badf0931a38b Patch

https://git.kernel.org/stable/c/1e116c18e32b035a2d1bd460800072c8bf96bc44 No Types Assigned

https://git.kernel.org/stable/c/1e116c18e32b035a2d1bd460800072c8bf96bc44 Patch

https://git.kernel.org/stable/c/2feab2492deb2f14f9675dd6388e9e2bf669c27a No Types Assigned

https://git.kernel.org/stable/c/2feab2492deb2f14f9675dd6388e9e2bf669c27a Patch

https://git.kernel.org/stable/c/d467194018dd536fe6c65a2fd3aedfcdb1424903 No Types Assigned

https://git.kernel.org/stable/c/d467194018dd536fe6c65a2fd3aedfcdb1424903 Patch

In the Linux kernel, the following vulnerability has been resolved:

Revert "sched/fair: Make sure to try to detach at least one movable task"

This reverts commit b0defa7ae03ecf91b8bfd10ede430cff12fcbd06.

b0defa7ae03ec changed the load balancing logic to ignore env.max_loop if
all tasks examined to that point were pinned. The goal of the patch was
to make it more likely to be able to detach a task buried in a long list
of pinned tasks. However, this has the unfortunate side effect of
creating an O(n) iteration in detach_tasks(), as we now must fully
iterate every task on a cpu if all or most are pinned. Since this load
balance code is done with rq lock held, and often in softirq context, it
is very easy to trigger hard lockups. We observed such hard lockups with
a user who affined O(10k) threads to a single cpu.

When I discussed this with Vincent he initially suggested that we keep
the limit on the number of tasks to detach, but increase the number of
tasks we can search. However, after some back and forth on the mailing
list, he recommended we instead revert the original patch, as it seems
likely no one was actually getting hit by the original issue.

kernel.org https://git.kernel.org/stable/c/0fa6dcbfa2e2b97c1e6febbea561badf0931a38b [No types assigned]

kernel.org https://git.kernel.org/stable/c/1e116c18e32b035a2d1bd460800072c8bf96bc44 [No types assigned]

kernel.org https://git.kernel.org/stable/c/2feab2492deb2f14f9675dd6388e9e2bf669c27a [No types assigned]

kernel.org https://git.kernel.org/stable/c/d467194018dd536fe6c65a2fd3aedfcdb1424903 [No types assigned]