fkie_cve-2022-48740
Vulnerability from fkie_nvd
Published
2024-06-20 12:15
Modified
2025-05-27 18:31
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: selinux: fix double free of cond_list on error paths On error path from cond_read_list() and duplicate_policydb_cond_list() the cond_list_destroy() gets called a second time in caller functions, resulting in NULL pointer deref. Fix this by resetting the cond_list_len to 0 in cond_list_destroy(), making subsequent calls a noop. Also consistently reset the cond_list pointer to NULL after freeing. [PM: fix line lengths in the description]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/186edf7e368c40d06cf727a1ad14698ea67b74adPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/70caa32e6d81f45f0702070c0e4dfe945e92fbd7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7ed9cbf7ac0d4ed86b356e1b944304ae9ee450d4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f446089a268c8fc6908488e991d28a9b936293dbPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/186edf7e368c40d06cf727a1ad14698ea67b74adPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/70caa32e6d81f45f0702070c0e4dfe945e92fbd7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7ed9cbf7ac0d4ed86b356e1b944304ae9ee450d4Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f446089a268c8fc6908488e991d28a9b936293dbPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.17
linux linux_kernel 5.17


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "20C3AAF0-B9C1-4675-B338-B4F8FC0402B6",
              "versionEndExcluding": "5.10.99",
              "versionStartIncluding": "5.7",
              "vulnerable": true
            },
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: fix double free of cond_list on error paths\n\nOn error path from cond_read_list() and duplicate_policydb_cond_list()\nthe cond_list_destroy() gets called a second time in caller functions,\nresulting in NULL pointer deref.  Fix this by resetting the\ncond_list_len to 0 in cond_list_destroy(), making subsequent calls a\nnoop.\n\nAlso consistently reset the cond_list pointer to NULL after freeing.\n\n[PM: fix line lengths in the description]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: selinux: corrige el doble libre de cond_list en rutas de error En la ruta de error de cond_read_list() y duplicado_policydb_cond_list(), se llama a cond_list_destroy() por segunda vez en las funciones de llamada, lo que resulta en un puntero NULL deref. Solucione este problema restableciendo cond_list_len a 0 en cond_list_destroy(), haciendo que las llamadas posteriores sean un error. Tambi\u00e9n restablezca constantemente el puntero cond_list a NULL despu\u00e9s de liberarlo. [PM: corrija la longitud de las l\u00edneas en la descripci\u00f3n]"
    }
  ],
  "id": "CVE-2022-48740",
  "lastModified": "2025-05-27T18:31:42.603",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-06-20T12:15:12.330",
  "references": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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