Vulnerability Details CVE-2023-52942
In the Linux kernel, the following vulnerability has been resolved:
cgroup/cpuset: Fix wrong check in update_parent_subparts_cpumask()
It was found that the check to see if a partition could use up all
the cpus from the parent cpuset in update_parent_subparts_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 effective_cpus is a subset of the child's cpus_allowed.
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
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.0%
CVSS Severity
CVSS v3 Score 5.5
References
Products affected by CVE-2023-52942
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cpe:2.3:o:linux:linux_kernel:6.1
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cpe:2.3:o:linux:linux_kernel:6.1.0
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cpe:2.3:o:linux:linux_kernel:6.1.1
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cpe:2.3:o:linux:linux_kernel:6.1.10
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cpe:2.3:o:linux:linux_kernel:6.1.2
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cpe:2.3:o:linux:linux_kernel:6.1.3
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cpe:2.3:o:linux:linux_kernel:6.1.4
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cpe:2.3:o:linux:linux_kernel:6.1.5
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cpe:2.3:o:linux:linux_kernel:6.1.6
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cpe:2.3:o:linux:linux_kernel:6.1.7
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cpe:2.3:o:linux:linux_kernel:6.1.8
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cpe:2.3:o:linux:linux_kernel:6.1.9
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cpe:2.3:o:linux:linux_kernel:6.2