CVE-2023-52942 (GCVE-0-2023-52942)
Vulnerability from cvelistv5
Published
2025-03-27 16:37
Modified
2025-05-04 07:46
Severity ?
Summary
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
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a2ab7f2cf5ef8f0c6212a246e681d1fe358cec1f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e5ae8803847b80fe9d744a3174abe2b7bfed222a
Impacted products
Vendor Product Version
Linux Linux Version: f0af1bfc27b52a4d42510051154c61bd176a8f06
Version: f0af1bfc27b52a4d42510051154c61bd176a8f06
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   Linux Linux Version: 6.1
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/cgroup/cpuset.c",
            "tools/testing/selftests/cgroup/test_cpuset_prs.sh"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a2ab7f2cf5ef8f0c6212a246e681d1fe358cec1f",
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          ],
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          "vendor": "Linux",
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            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "version": "6.2",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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          "nodes": [
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                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:46:34.623Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a2ab7f2cf5ef8f0c6212a246e681d1fe358cec1f"
        },
        {
          "url": "https://git.kernel.org/stable/c/e5ae8803847b80fe9d744a3174abe2b7bfed222a"
        }
      ],
      "title": "cgroup/cpuset: Fix wrong check in update_parent_subparts_cpumask()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-52942",
    "datePublished": "2025-03-27T16:37:20.155Z",
    "dateReserved": "2024-08-21T06:07:11.022Z",
    "dateUpdated": "2025-05-04T07:46:34.623Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52942\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-03-27T17:15:44.163\",\"lastModified\":\"2025-03-28T18:11:49.747\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/a2ab7f2cf5ef8f0c6212a246e681d1fe358cec1f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e5ae8803847b80fe9d744a3174abe2b7bfed222a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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