« Volver al listado

CVE-2023-53210

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

md/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid()

r5l_flush_stripe_to_raid() will check if the list 'flushing_ios' is empty, and then submit 'flush_bio', however, r5l_log_flush_endio() is clearing the list first and then clear the bio, which will cause null-ptr-deref:

T2: io1 is done r5l_log_flush_endio list_splice_tail_init // clear the list T3: submit new flush io ... r5l_flush_stripe_to_raid // list is empty // add 'io_end_ios' to the list bio_init bio_uninit // clear bio->bi_blkg submit_bio // null-ptr-deref

Leer descripción completaMostrar menos

Fix this problem by clearing bio before clearing the list in r5l_log_flush_endio().

Detalles técnicos trazas, registros y código del informe original
T1: submit flush io
raid5d
 handle_active_stripes
  r5l_flush_stripe_to_raid
   // list is empty
   // add 'io_end_ios' to the list
   bio_init
   submit_bio
   // io1

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-2023-53210",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-53210",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-14T17:48:25.419997Z"
        }
      }
    ],
    "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
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "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
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "0dd00cba99c352dc9afd62979f350d808c215cb9",
              "lessThan": "711fb92606208a8626b785da4f9f23d648a5b6c8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0dd00cba99c352dc9afd62979f350d808c215cb9",
              "lessThan": "7a8b6d93991bf4b72b3f959baea35397c6c8e521",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0dd00cba99c352dc9afd62979f350d808c215cb9",
              "lessThan": "e46b2e7be8059d156af8c011dd8d665229b65886",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0dd00cba99c352dc9afd62979f350d808c215cb9",
              "lessThan": "0d0bd28c500173bfca78aa840f8f36d261ef1765",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/md/raid5-cache.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.18",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.4.16",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "status": "unaffected",
              "version": "6.5.3",
              "versionType": "semver",
              "lessThanOrEqual": "6.5.*"
            },
            {
              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/md/raid5-cache.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-09-15T15:15:47.547",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0d0bd28c500173bfca78aa840f8f36d261ef1765",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/711fb92606208a8626b785da4f9f23d648a5b6c8",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7a8b6d93991bf4b72b3f959baea35397c6c8e521",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e46b2e7be8059d156af8c011dd8d665229b65886",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid()\n\nr5l_flush_stripe_to_raid() will check if the list 'flushing_ios' is\nempty, and then submit 'flush_bio', however, r5l_log_flush_endio()\nis clearing the list first and then clear the bio, which will cause\nnull-ptr-deref:\n\nT1: submit flush io\nraid5d\n handle_active_stripes\n  r5l_flush_stripe_to_raid\n   // list is empty\n   // add 'io_end_ios' to the list\n   bio_init\n   submit_bio\n   // io1\n\nT2: io1 is done\nr5l_log_flush_endio\n list_splice_tail_init\n // clear the list\n\t\t\tT3: submit new flush io\n\t\t\t...\n\t\t\tr5l_flush_stripe_to_raid\n\t\t\t // list is empty\n\t\t\t // add 'io_end_ios' to the list\n\t\t\t bio_init\n bio_uninit\n // clear bio->bi_blkg\n\t\t\t submit_bio\n\t\t\t // null-ptr-deref\n\nFix this problem by clearing bio before clearing the list in\nr5l_log_flush_endio()."
    }
  ],
  "lastModified": "2026-06-17T06:44:30.913",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D6D40380-C0F3-42CE-9D26-957632D198A4",
              "versionEndExcluding": "6.1.53",
              "versionStartIncluding": "5.18"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C3039EA3-F6CA-43EF-9F17-81A7EC6841EF",
              "versionEndExcluding": "6.4.16",
              "versionStartIncluding": "6.2"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "880C803A-BEAE-4DA0-8A59-AC023F7B4EE3",
              "versionEndExcluding": "6.5.3",
              "versionStartIncluding": "6.5"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}