« Volver al listado

CVE-2025-71304

Estado: AnalizadaMedia (5.5)—

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

smack: /smack/doi: accept previously used values

Writing to /smack/doi a value that has ever been written there in the past disables networking for non-ambient labels. E.g.

This happens because Smack keeps decommissioned DOIs, fails to re-add them, and consequently refuses to add the “default” domain map:

Fix by clearing decommissioned DOI definitions and serializing concurrent DOI updates with a new lock.

(2008-02-04, Casey Schaufler)

Detalles técnicos trazas, registros y código del informe original
    # cat /smack/doi
    3
    # netlabelctl -p cipso list
    Configured CIPSO mappings (1)
     DOI value : 3
       mapping type : PASS_THROUGH
    # netlabelctl -p map list
    Configured NetLabel domain mappings (3)
     domain: "_" (IPv4)
       protocol: UNLABELED
     domain: DEFAULT (IPv4)
       protocol: CIPSO, DOI = 3
     domain: DEFAULT (IPv6)
       protocol: UNLABELED

    # cat /smack/ambient
    _
    # cat /proc/$$/attr/smack/current
    _
    # ping -c1 10.1.95.12
    64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.964 ms
    # echo foo >/proc/$$/attr/smack/current
    # ping -c1 10.1.95.12
    64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.956 ms
    unknown option 86

    # echo 4 >/smack/doi
    # echo 3 >/smack/doi
!>  [  214.050395] smk_cipso_doi:691 cipso add rc = -17
    # echo 3 >/smack/doi
!>  [  249.402261] smk_cipso_doi:678 remove rc = -2
!>  [  249.402261] smk_cipso_doi:691 cipso add rc = -17

    # ping -c1 10.1.95.12
!!> ping: 10.1.95.12: Address family for hostname not supported

    # echo _ >/proc/$$/attr/smack/current
    # ping -c1 10.1.95.12
    64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.617 ms

    # netlabelctl -p cipso list
    Configured CIPSO mappings (2)
     DOI value : 3
       mapping type : PASS_THROUGH
     DOI value : 4
       mapping type : PASS_THROUGH
    # netlabelctl -p map list
    Configured NetLabel domain mappings (2)
     domain: "_" (IPv4)
       protocol: UNLABELED
!>  (no ipv4 map for default domain here)
     domain: DEFAULT (IPv6)
       protocol: UNLABELED

Also:
- allow /smack/doi to live unconfigured, since
  adding a map (netlbl_cfg_cipsov4_map_add) may fail.
  CIPSO_V4_DOI_UNKNOWN(0) indicates the unconfigured DOI
- add new DOI before removing the old default map,
  so the old map remains if the add fails

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)

Mostrar
{
  "id": "CVE-2025-71304",
  "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": "e114e473771c848c3cfec05f0123e70f1cdbdc99",
              "lessThan": "eb718a3c8181ada679340db34cd61bce48e44749",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99",
              "lessThan": "6ec091c5c7eeabd249a7c46813cad1e9f555f859",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99",
              "lessThan": "199452f22d2f74b897fe826f81ec402b0a8461a0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99",
              "lessThan": "1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99",
              "lessThan": "f8071500177f38cff38892bd85ac631cc6e010b2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99",
              "lessThan": "5a247a84de0ba44edbbd6be851c8a6b2aa60ff85",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99",
              "lessThan": "8beebb8ad9a003f978e53b06237986588223e15e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99",
              "lessThan": "33d589ed60ae433b483761987b85e0d24e54584e",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "security/smack/smackfs.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.25"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.25",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.252",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "security/smack/smackfs.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-05-27T14:16:42.850",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/199452f22d2f74b897fe826f81ec402b0a8461a0",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/33d589ed60ae433b483761987b85e0d24e54584e",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5a247a84de0ba44edbbd6be851c8a6b2aa60ff85",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6ec091c5c7eeabd249a7c46813cad1e9f555f859",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8beebb8ad9a003f978e53b06237986588223e15e",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/eb718a3c8181ada679340db34cd61bce48e44749",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f8071500177f38cff38892bd85ac631cc6e010b2",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmack: /smack/doi: accept previously used values\n\nWriting to /smack/doi a value that has ever been\nwritten there in the past disables networking for\nnon-ambient labels.\nE.g.\n\n    # cat /smack/doi\n    3\n    # netlabelctl -p cipso list\n    Configured CIPSO mappings (1)\n     DOI value : 3\n       mapping type : PASS_THROUGH\n    # netlabelctl -p map list\n    Configured NetLabel domain mappings (3)\n     domain: \"_\" (IPv4)\n       protocol: UNLABELED\n     domain: DEFAULT (IPv4)\n       protocol: CIPSO, DOI = 3\n     domain: DEFAULT (IPv6)\n       protocol: UNLABELED\n\n    # cat /smack/ambient\n    _\n    # cat /proc/$$/attr/smack/current\n    _\n    # ping -c1 10.1.95.12\n    64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.964 ms\n    # echo foo >/proc/$$/attr/smack/current\n    # ping -c1 10.1.95.12\n    64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.956 ms\n    unknown option 86\n\n    # echo 4 >/smack/doi\n    # echo 3 >/smack/doi\n!>  [  214.050395] smk_cipso_doi:691 cipso add rc = -17\n    # echo 3 >/smack/doi\n!>  [  249.402261] smk_cipso_doi:678 remove rc = -2\n!>  [  249.402261] smk_cipso_doi:691 cipso add rc = -17\n\n    # ping -c1 10.1.95.12\n!!> ping: 10.1.95.12: Address family for hostname not supported\n\n    # echo _ >/proc/$$/attr/smack/current\n    # ping -c1 10.1.95.12\n    64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.617 ms\n\nThis happens because Smack keeps decommissioned DOIs,\nfails to re-add them, and consequently refuses to add\nthe “default” domain map:\n\n    # netlabelctl -p cipso list\n    Configured CIPSO mappings (2)\n     DOI value : 3\n       mapping type : PASS_THROUGH\n     DOI value : 4\n       mapping type : PASS_THROUGH\n    # netlabelctl -p map list\n    Configured NetLabel domain mappings (2)\n     domain: \"_\" (IPv4)\n       protocol: UNLABELED\n!>  (no ipv4 map for default domain here)\n     domain: DEFAULT (IPv6)\n       protocol: UNLABELED\n\nFix by clearing decommissioned DOI definitions and\nserializing concurrent DOI updates with a new lock.\n\nAlso:\n- allow /smack/doi to live unconfigured, since\n  adding a map (netlbl_cfg_cipsov4_map_add) may fail.\n  CIPSO_V4_DOI_UNKNOWN(0) indicates the unconfigured DOI\n- add new DOI before removing the old default map,\n  so the old map remains if the add fails\n\n(2008-02-04, Casey Schaufler)"
    }
  ],
  "lastModified": "2026-06-25T21:04:41.440",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C84A76EC-E20E-48DD-966B-1ABC479AC45D",
              "versionEndExcluding": "5.10.252",
              "versionStartIncluding": "2.6.25"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4002FC2B-1456-4666-B240-0EBF590C4671",
              "versionEndExcluding": "5.15.202",
              "versionStartIncluding": "5.11"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "797C7F46-D0BE-4FB8-A502-C5EF8E6B6654",
              "versionEndExcluding": "6.1.165",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2",
              "versionEndExcluding": "6.6.128",
              "versionStartIncluding": "6.2"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2",
              "versionEndExcluding": "6.12.75",
              "versionStartIncluding": "6.7"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BF463CB7-1F58-4607-B847-77ED23E4B9B7",
              "versionEndExcluding": "6.18.14",
              "versionStartIncluding": "6.13"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "672A3E79-EC03-479D-8503-361DFBDC8092",
              "versionEndExcluding": "6.19.4",
              "versionStartIncluding": "6.19"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}