{"cve":"CVE-2023-52942","nvd":{"published":"2025-03-27T17:15:44.163","modified":"2026-06-17T06:43:59.270","status":"Analyzed","description":"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","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/a2ab7f2cf5ef8f0c6212a246e681d1fe358cec1f","https://git.kernel.org/stable/c/e5ae8803847b80fe9d744a3174abe2b7bfed222a"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:00:28.034033815+00:00"},"epss":{"cve":"CVE-2023-52942","score":0.00228,"percentile":0.13679,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}