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CVE-2023-52940

Estado: AnalizadaMedia (5.5)—

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:

And when the above happens, kernel crashes because of linked list corruption (mm_struct->lru_gen.list).

Detalles técnicos trazas, registros y código del informe original
    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()

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2023-52940",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
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          "product": "Linux",
          "versions": [
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          "defaultStatus": "unaffected"
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        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "version": "6.1"
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              "version": "0",
              "lessThan": "6.1",
              "versionType": "semver"
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              "version": "6.1.11",
              "versionType": "semver",
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              "status": "unaffected",
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          "programFiles": [
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          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-03-27T17:15:43.920",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/04448022311cebd30969d3aebdde765f1258b360",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/de08eaa6156405f2e9369f06ba5afae0e4ab3b62",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: multi-gen LRU: fix crash during cgroup migration\n\nlru_gen_migrate_mm() assumes lru_gen_add_mm() runs prior to itself.  This\nisn't true for the following scenario:\n\n    CPU 1                         CPU 2\n\n  clone()\n    cgroup_can_fork()\n                                cgroup_procs_write()\n    cgroup_post_fork()\n                                  task_lock()\n                                  lru_gen_migrate_mm()\n                                  task_unlock()\n    task_lock()\n    lru_gen_add_mm()\n    task_unlock()\n\nAnd when the above happens, kernel crashes because of linked list\ncorruption (mm_struct->lru_gen.list)."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm: LRU multigeneración: se corrige un fallo durante la migración de cgroup. lru_gen_migrate_mm() asume que lru_gen_add_mm() se ejecuta antes que él mismo. Esto no se cumple en el siguiente escenario: 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(). Cuando esto ocurre, el kernel se bloquea debido a la corrupción de la lista enlazada (mm_struct->lru_gen.list)."
    }
  ],
  "lastModified": "2026-06-17T06:43:59.057",
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