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CVE-2022-50148

Estado: AnalizadaMedia (5.5)—

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

kernfs: fix potential NULL dereference in __kernfs_remove

When lockdep is enabled, lockdep_assert_held_write would cause potential NULL pointer dereference.

Fix the following smatch warnings:

fs/kernfs/dir.c:1353 __kernfs_remove() warn: variable dereferenced before check 'kn' (see line 1346)

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)

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{
  "id": "CVE-2022-50148",
  "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
      }
    ]
  },
  "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": "393c3714081a53795bbff0e985d24146def6f57f",
              "lessThan": "b871986d9d3071f5082664ac274d93f08db257cd",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "393c3714081a53795bbff0e985d24146def6f57f",
              "lessThan": "4a9f35b8729c5bf13ea671c908c17ed74c48fc50",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "393c3714081a53795bbff0e985d24146def6f57f",
              "lessThan": "72b5d5aef246a0387cefa23121dd90901c7a691a",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/kernfs/dir.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.17"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.17",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.18.18",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "status": "unaffected",
              "version": "5.19.2",
              "versionType": "semver",
              "lessThanOrEqual": "5.19.*"
            },
            {
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/kernfs/dir.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-06-18T11:15:44.857",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/4a9f35b8729c5bf13ea671c908c17ed74c48fc50",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/72b5d5aef246a0387cefa23121dd90901c7a691a",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b871986d9d3071f5082664ac274d93f08db257cd",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkernfs: fix potential NULL dereference in __kernfs_remove\n\nWhen lockdep is enabled, lockdep_assert_held_write would\ncause potential NULL pointer dereference.\n\nFix the following smatch warnings:\n\nfs/kernfs/dir.c:1353 __kernfs_remove() warn: variable dereferenced before check 'kn' (see line 1346)"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: kernfs: se corrige una posible desreferencia de punteros NULL en __kernfs_remove. Cuando lockdep está habilitado, lockdep_assert_held_write podría causar una posible desreferencia de punteros NULL. Se corrigen las siguientes advertencias de coincidencia: fs/kernfs/dir.c:1353 __kernfs_remove() warn: variable desreferenciada antes de la comprobación 'kn' (véase la línea 1346)."
    }
  ],
  "lastModified": "2026-06-17T05:22:51.487",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7B831238-84A7-4D00-BF02-02E058AD3C34",
              "versionEndExcluding": "5.18.18",
              "versionStartIncluding": "5.17"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A1A2A5A5-4598-4D7E-BA07-4660398D6C8F",
              "versionEndExcluding": "5.19.2",
              "versionStartIncluding": "5.19"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}