FKIE_CVE-2021-46923

Vulnerability from fkie_nvd - Published: 2024-02-27 10:15 - Updated: 2024-11-21 06:34
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/mount_setattr: always cleanup mount_kattr Make sure that finish_mount_kattr() is called after mount_kattr was succesfully built in both the success and failure case to prevent leaking any references we took when we built it. We returned early if path lookup failed thereby risking to leak an additional reference we took when building mount_kattr when an idmapped mount was requested.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/012e332286e2bb9f6ac77d195f17e74b2963d663Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/47b5d0a7532d39e42a938f81e3904268145c341dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/012e332286e2bb9f6ac77d195f17e74b2963d663Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/47b5d0a7532d39e42a938f81e3904268145c341dPatch
Impacted products
Vendor Product Version
linux linux_kernel *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "9E1109BB-1C98-497B-8CBA-EA69276884AD",
              "versionEndExcluding": "5.15.13",
              "versionStartIncluding": "5.12.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/mount_setattr: always cleanup mount_kattr\n\nMake sure that finish_mount_kattr() is called after mount_kattr was\nsuccesfully built in both the success and failure case to prevent\nleaking any references we took when we built it.  We returned early if\npath lookup failed thereby risking to leak an additional reference we\ntook when building mount_kattr when an idmapped mount was requested."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fs/mount_setattr: limpiar siempre mount_kattr. Aseg\u00farese de que se llame a finish_mount_kattr() despu\u00e9s de que mount_kattr se haya compilado con \u00e9xito tanto en el caso de \u00e9xito como en el de fracaso para evitar que se filtren las referencias que tomamos cuando lo compilamos. Regresamos temprano si falla la b\u00fasqueda de ruta, por lo que corremos el riesgo de filtrar una referencia adicional que tomamos al compilar mount_kattr cuando se solicit\u00f3 un montaje con idmapped."
    }
  ],
  "id": "CVE-2021-46923",
  "lastModified": "2024-11-21T06:34:56.550",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-02-27T10:15:07.100",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/012e332286e2bb9f6ac77d195f17e74b2963d663"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/47b5d0a7532d39e42a938f81e3904268145c341d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/012e332286e2bb9f6ac77d195f17e74b2963d663"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/47b5d0a7532d39e42a938f81e3904268145c341d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-668"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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