mm: multi-gen LRU: fix crash during cgroup migration

{
  "id": "476407307830bf68894477159ccdfd34ac3ce2b359a12bc66768f47178a4cdc5",
  "url": "https://osv.dev/vulnerability/CVE-2023-52940",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mm: multi-gen LRU: fix crash during cgroup migration",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: mm: multi-gen LRU: fix crash during cgroup migration lru_gen_migrate_mm() assumes lru_gen_add_mm() runs prior to itself. This isn't true for the following scenario: CPU 1 CPU 2 clone() cgroup_can_fork() cgroup_procs_write() cgroup_post_fork() task_lock() lru_gen_migrate_mm() task_unlock() task_lock() lru_gen_add_mm() task_unlock() And when the above happens, kernel crashes because of linked list corruption (mm_struct->lru_gen.list).",
    "evidence": "osv:CVE-2023-52940",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.11",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2023-52940",
      "aliases": [
        "CVE-2023-52940"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "bd74fdaea146029e4fa12c6de89adbe0779348a9"
                },
                {
                  "fixed": "04448022311cebd30969d3aebdde765f1258b360"
                },
                {
                  "fixed": "de08eaa6156405f2e9369f06ba5afae0e4ab3b62"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52940.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.1.0"
                },
                {
                  "fixed": "6.1.11"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52940.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.807020653Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/04448022311cebd30969d3aebdde765f1258b360",
        "https://git.kernel.org/stable/c/de08eaa6156405f2e9369f06ba5afae0e4ab3b62",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52940.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-52940",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52940.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-52940",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 518224,
  "published_at": "2025-03-27T16:37:18.691+00:00"
}