CVE-2023-52942
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2023-52942
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52942.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2023-52942
- Related
- Published
- 2025-03-27T17:15:44Z
- Modified
- 2025-03-28T18:11:49Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
cgroup/cpuset: Fix wrong check in updateparentsubparts_cpumask()
It was found that the check to see if a partition could use up all the cpus from the parent cpuset in updateparentsubparts_cpumask() was incorrect. As a result, it is possible to leave parent with no effective cpu left even if there are tasks in the parent cpuset. This can lead to system panic as reported in [1].
Fix this probem by updating the check to fail the enabling the partition if parent's effectivecpus is a subset of the child's cpusallowed.
Also record the error code when an error happens in update_prstate() and add a test case where parent partition and child have the same cpu list and parent has task. Enabling partition in the child will fail in this case.
[1] https://www.spinics.net/lists/cgroups/msg36254.html
- References
Affected packages
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source