FKIE_CVE-2023-53055

Vulnerability from fkie_nvd - Published: 2025-05-02 16:15 - Updated: 2026-06-17 06:44
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: fscrypt: destroy keyring after security_sb_delete() fscrypt_destroy_keyring() must be called after all potentially-encrypted inodes were evicted; otherwise it cannot safely destroy the keyring. Since inodes that are in-use by the Landlock LSM don't get evicted until security_sb_delete(), this means that fscrypt_destroy_keyring() must be called *after* security_sb_delete(). This fixes a WARN_ON followed by a NULL dereference, only possible if Landlock was being used on encrypted files.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/497ab5d9c7852dfedab2c9de75e41b60e54b7c5dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/992a3f3e8a0c92151dfdf65fc85567c865fd558aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d77531fac6a1fd9f1db0195438ba5419d72b96c4Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.3
linux linux_kernel 6.3
linux linux_kernel 6.3
To clipboard 

{
  "affected": [
    {
      "affectedData": [
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          "product": "Linux",
          "programFiles": [
            "fs/super.c"
          ],
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            },
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              "version": "5.15.78",
              "versionType": "semver"
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              "status": "affected",
              "version": "6.0.8",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "6.1"
            },
            {
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              "status": "unaffected",
              "version": "0",
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            },
            {
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              "status": "unaffected",
              "version": "6.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
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          "negate": false,
          "operator": "OR"
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      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfscrypt: destroy keyring after security_sb_delete()\n\nfscrypt_destroy_keyring() must be called after all potentially-encrypted\ninodes were evicted; otherwise it cannot safely destroy the keyring.\nSince inodes that are in-use by the Landlock LSM don\u0027t get evicted until\nsecurity_sb_delete(), this means that fscrypt_destroy_keyring() must be\ncalled *after* security_sb_delete().\n\nThis fixes a WARN_ON followed by a NULL dereference, only possible if\nLandlock was being used on encrypted files."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fscrypt: destruir el anillo de claves despu\u00e9s de security_sb_delete(). fscrypt_destroy_keyring() debe llamarse despu\u00e9s de expulsar todos los inodos potencialmente cifrados; de lo contrario, no puede destruir el anillo de claves de forma segura. Dado que los inodos en uso por el LSM de Landlock no se expulsan hasta security_sb_delete(), esto significa que fscrypt_destroy_keyring() debe llamarse *despu\u00e9s* de security_sb_delete(). Esto corrige un WARN_ON seguido de una desreferencia a NULL, solo posible si Landlock se utilizaba en archivos cifrados."
    }
  ],
  "id": "CVE-2023-53055",
  "lastModified": "2026-06-17T06:44:12.603",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-05-02T16:15:24.590",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/497ab5d9c7852dfedab2c9de75e41b60e54b7c5d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/992a3f3e8a0c92151dfdf65fc85567c865fd558a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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