ghsa-5w7q-3v7j-8q5q
Vulnerability from github
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
{
"affected": [],
"aliases": [
"CVE-2023-52942"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-27T17:15:44Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncgroup/cpuset: Fix wrong check in update_parent_subparts_cpumask()\n\nIt was found that the check to see if a partition could use up all\nthe cpus from the parent cpuset in update_parent_subparts_cpumask()\nwas incorrect. As a result, it is possible to leave parent with no\neffective cpu left even if there are tasks in the parent cpuset. This\ncan lead to system panic as reported in [1].\n\nFix this probem by updating the check to fail the enabling the partition\nif parent\u0027s effective_cpus is a subset of the child\u0027s cpus_allowed.\n\nAlso record the error code when an error happens in update_prstate()\nand add a test case where parent partition and child have the same cpu\nlist and parent has task. Enabling partition in the child will fail in\nthis case.\n\n[1] https://www.spinics.net/lists/cgroups/msg36254.html",
"id": "GHSA-5w7q-3v7j-8q5q",
"modified": "2025-03-27T18:31:26Z",
"published": "2025-03-27T18:31:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52942"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a2ab7f2cf5ef8f0c6212a246e681d1fe358cec1f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e5ae8803847b80fe9d744a3174abe2b7bfed222a"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
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