fkie_cve-2022-49366
Vulnerability from fkie_nvd
Published
2025-02-26 07:01
Modified
2025-04-14 20:42
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: ksmbd: fix reference count leak in smb_check_perm_dacl() The issue happens in a specific path in smb_check_perm_dacl(). When "id" and "uid" have the same value, the function simply jumps out of the loop without decrementing the reference count of the object "posix_acls", which is increased by get_acl() earlier. This may result in memory leaks. Fix it by decreasing the reference count of "posix_acls" before jumping to label "check_access_bits".
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/248d71b440aef829f5cc5f6545ca113ef5062900Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9758a6653c27867d810de02b4e5697163dda9883Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cf824b95c12a1abacadbc2d069931963221a3414Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d21a580dafc69aa04f46e6099616146a536b0724Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B3166432-278C-4CF4-AE75-4257C99F32BD",
              "versionEndExcluding": "5.15.47",
              "versionStartIncluding": "5.15",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "53E7AA2E-2FB4-45CA-A22B-08B4EDBB51AD",
              "versionEndExcluding": "5.17.15",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FA6D643C-6D6A-4821-8A8D-B5776B8F0103",
              "versionEndExcluding": "5.18.4",
              "versionStartIncluding": "5.18",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix reference count leak in smb_check_perm_dacl()\n\nThe issue happens in a specific path in smb_check_perm_dacl(). When\n\"id\" and \"uid\" have the same value, the function simply jumps out of\nthe loop without decrementing the reference count of the object\n\"posix_acls\", which is increased by get_acl() earlier. This may\nresult in memory leaks.\n\nFix it by decreasing the reference count of \"posix_acls\" before\njumping to label \"check_access_bits\"."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: se corrige la p\u00e9rdida de recuento de referencias en smb_check_perm_dacl() El problema ocurre en una ruta espec\u00edfica en smb_check_perm_dacl(). Cuando \"id\" y \"uid\" tienen el mismo valor, la funci\u00f3n simplemente salta del bucle sin disminuir el recuento de referencias del objeto \"posix_acls\", que se incrementa mediante get_acl() anteriormente. Esto puede provocar fugas de memoria. Arr\u00e9glelo disminuyendo el recuento de referencias de \"posix_acls\" antes de saltar a la etiqueta \"check_access_bits\"."
    }
  ],
  "id": "CVE-2022-49366",
  "lastModified": "2025-04-14T20:42:02.230",
  "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": "2025-02-26T07:01:13.230",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/248d71b440aef829f5cc5f6545ca113ef5062900"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/9758a6653c27867d810de02b4e5697163dda9883"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/cf824b95c12a1abacadbc2d069931963221a3414"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/d21a580dafc69aa04f46e6099616146a536b0724"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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