{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f0af1bfc27b52a4d42510051154c61bd176a8f06"
            },
            {
              "fixed": "a2ab7f2cf5ef8f0c6212a246e681d1fe358cec1f"
            },
            {
              "fixed": "e5ae8803847b80fe9d744a3174abe2b7bfed222a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52942.json"
  },
  "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's effective_cpus is a subset of the child's 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": "CVE-2023-52942",
  "modified": "2026-04-01T23:09:42.050327844Z",
  "published": "2025-03-27T16:37:20.155Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a2ab7f2cf5ef8f0c6212a246e681d1fe358cec1f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e5ae8803847b80fe9d744a3174abe2b7bfed222a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52942.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52942"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.3",
  "summary": "cgroup/cpuset: Fix wrong check in update_parent_subparts_cpumask()"
}