CVE-2025-71304 (GCVE-0-2025-71304)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:14 – Updated: 2026-05-27 12:14
VLAI
Title
smack: /smack/doi: accept previously used values
Summary
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. # 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 This happens because Smack keeps decommissioned DOIs, fails to re-add them, and consequently refuses to add the “default” domain map: # 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 Fix by clearing decommissioned DOI definitions and serializing concurrent DOI updates with a new lock. 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 (2008-02-04, Casey Schaufler)
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e114e473771c848c3cfec05f0123e70f1cdbdc99 , < eb718a3c8181ada679340db34cd61bce48e44749 (git)
Affected: e114e473771c848c3cfec05f0123e70f1cdbdc99 , < 6ec091c5c7eeabd249a7c46813cad1e9f555f859 (git)
Affected: e114e473771c848c3cfec05f0123e70f1cdbdc99 , < 199452f22d2f74b897fe826f81ec402b0a8461a0 (git)
Affected: e114e473771c848c3cfec05f0123e70f1cdbdc99 , < 1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3 (git)
Affected: e114e473771c848c3cfec05f0123e70f1cdbdc99 , < f8071500177f38cff38892bd85ac631cc6e010b2 (git)
Affected: e114e473771c848c3cfec05f0123e70f1cdbdc99 , < 5a247a84de0ba44edbbd6be851c8a6b2aa60ff85 (git)
Affected: e114e473771c848c3cfec05f0123e70f1cdbdc99 , < 8beebb8ad9a003f978e53b06237986588223e15e (git)
Affected: e114e473771c848c3cfec05f0123e70f1cdbdc99 , < 33d589ed60ae433b483761987b85e0d24e54584e (git)
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Linux Linux Affected: 2.6.25
Unaffected: 0 , < 2.6.25 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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        {
          "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 \u003e/proc/$$/attr/smack/current\n    # ping -c1 10.1.95.12\n    64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.956 ms\n    unknown option 86\n\n    # echo 4 \u003e/smack/doi\n    # echo 3 \u003e/smack/doi\n!\u003e  [  214.050395] smk_cipso_doi:691 cipso add rc = -17\n    # echo 3 \u003e/smack/doi\n!\u003e  [  249.402261] smk_cipso_doi:678 remove rc = -2\n!\u003e  [  249.402261] smk_cipso_doi:691 cipso add rc = -17\n\n    # ping -c1 10.1.95.12\n!!\u003e ping: 10.1.95.12: Address family for hostname not supported\n\n    # echo _ \u003e/proc/$$/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 \u201cdefault\u201d 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!\u003e  (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)"
        }
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        "dateUpdated": "2026-05-27T12:14:53.289Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/eb718a3c8181ada679340db34cd61bce48e44749"
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          "url": "https://git.kernel.org/stable/c/199452f22d2f74b897fe826f81ec402b0a8461a0"
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          "url": "https://git.kernel.org/stable/c/33d589ed60ae433b483761987b85e0d24e54584e"
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      ],
      "title": "smack: /smack/doi: accept previously used values",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71304",
    "datePublished": "2026-05-27T12:14:53.289Z",
    "dateReserved": "2026-05-08T13:14:33.087Z",
    "dateUpdated": "2026-05-27T12:14:53.289Z",
    "state": "PUBLISHED"
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      "cve": "CVE-2025-71304",
      "date": "2026-05-29",
      "epss": "0.00024",
      "percentile": "0.07393"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-71304\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-27T14:16:42.850\",\"lastModified\":\"2026-05-27T14:48:31.480\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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/$$/attr/smack/current\\n    _\\n    # ping -c1 10.1.95.12\\n    64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.964 ms\\n    # echo foo \u003e/proc/$$/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 \u003e/smack/doi\\n    # echo 3 \u003e/smack/doi\\n!\u003e  [  214.050395] smk_cipso_doi:691 cipso add rc = -17\\n    # echo 3 \u003e/smack/doi\\n!\u003e  [  249.402261] smk_cipso_doi:678 remove rc = -2\\n!\u003e  [  249.402261] smk_cipso_doi:691 cipso add rc = -17\\n\\n    # ping -c1 10.1.95.12\\n!!\u003e ping: 10.1.95.12: Address family for hostname not supported\\n\\n    # echo _ \u003e/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 \u201cdefault\u201d 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!\u003e  (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)\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/199452f22d2f74b897fe826f81ec402b0a8461a0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/33d589ed60ae433b483761987b85e0d24e54584e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5a247a84de0ba44edbbd6be851c8a6b2aa60ff85\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6ec091c5c7eeabd249a7c46813cad1e9f555f859\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8beebb8ad9a003f978e53b06237986588223e15e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eb718a3c8181ada679340db34cd61bce48e44749\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f8071500177f38cff38892bd85ac631cc6e010b2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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Detection rules are retrieved from Rulezet.