« Volver al listado

CVE-2022-50329

Estado: ModificadaAlta (7.8)—

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

block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq

Commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'") will access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq() can free bfqq first, and then call bic_set_bfqq(), which will cause uaf.

Fix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:L + PR:L + UI:N indica escalada local sin interacción. UAF en kernel permite ejecución de código arbitrario con privilegios elevados (C:H, I:H). CWE-416 confirma uso después de liberación.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2022-50329",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "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": "5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a",
              "lessThan": "1425f1bb5df5239021fd09ebc2a5e8070e705d36",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "094f3d9314d67691cb21ba091c1b528f6e3c4893",
              "lessThan": "7949b0df3dd9f4817ed4a4e989fa9ee81df6205f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b22fd72bfebda3956efc4431b60ddfc0a51e03e0",
              "lessThan": "cfe5b38c37720313eff0dec5517442c7ab3c9a20",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "761564d93c8265f65543acf0a576b32d66bfa26a",
              "lessThan": "1ed959fef5b1c6f1a7a3fbea543698c30ebd6678",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "64dc8c732f5c2b406cc752e6aaa1bd5471159cab",
              "lessThan": "246cf66e300b76099b5dbd3fdd39e9a5dbc53f02",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "block/bfq-iosched.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15.86",
              "lessThan": "5.15.87",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.0.16",
              "lessThan": "6.0.17",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.1.2",
              "lessThan": "6.1.3",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "block/bfq-iosched.c"
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2025-09-15T15:15:45.067",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1425f1bb5df5239021fd09ebc2a5e8070e705d36",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1ed959fef5b1c6f1a7a3fbea543698c30ebd6678",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7949b0df3dd9f4817ed4a4e989fa9ee81df6205f",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cfe5b38c37720313eff0dec5517442c7ab3c9a20",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq\n\nCommit 64dc8c732f5c (\"block, bfq: fix possible uaf for 'bfqq->bic'\")\nwill access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq()\ncan free bfqq first, and then call bic_set_bfqq(), which will cause uaf.\n\nFix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq()."
    }
  ],
  "lastModified": "2026-08-04T10:18:11.217",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15.86:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "565709DF-CD9E-45F6-8BAB-1CDEBC2D14F9"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.0.16:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0F12ACFA-7194-43FD-B79A-93AEA2668E6F"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4A1A2CF8-ACB8-4475-B530-92ECBB0ADBF0"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FF501633-2F44-4913-A8EE-B021929F49F6"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}