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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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",
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      "title": "smack: /smack/doi: accept previously used values",
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    "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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    "epss": {
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      "date": "2026-07-10",
      "epss": "0.0016",
      "percentile": "0.05571"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-71304\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-27T14:16:42.850\",\"lastModified\":\"2026-06-25T21:04:41.440\",\"vulnStatus\":\"Analyzed\",\"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)\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"security/smack/smackfs.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"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\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"security/smack/smackfs.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.25\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.25\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.252\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.202\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.165\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.128\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.75\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.14\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.4\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.25\",\"versionEndExcluding\":\"5.10.252\",\"matchCriteriaId\":\"C84A76EC-E20E-48DD-966B-1ABC479AC45D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.202\",\"matchCriteriaId\":\"4002FC2B-1456-4666-B240-0EBF590C4671\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.165\",\"matchCriteriaId\":\"797C7F46-D0BE-4FB8-A502-C5EF8E6B6654\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.128\",\"matchCriteriaId\":\"851E9353-6C09-4CC9-877E-E09DB164A3C2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.75\",\"matchCriteriaId\":\"BCE16369-98ED-41CF-8995-DFDC10B288D2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.14\",\"matchCriteriaId\":\"BF463CB7-1F58-4607-B847-77ED23E4B9B7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.4\",\"matchCriteriaId\":\"672A3E79-EC03-479D-8503-361DFBDC8092\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/199452f22d2f74b897fe826f81ec402b0a8461a0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/33d589ed60ae433b483761987b85e0d24e54584e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5a247a84de0ba44edbbd6be851c8a6b2aa60ff85\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6ec091c5c7eeabd249a7c46813cad1e9f555f859\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8beebb8ad9a003f978e53b06237986588223e15e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/eb718a3c8181ada679340db34cd61bce48e44749\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f8071500177f38cff38892bd85ac631cc6e010b2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:13:18+00:00",
      "cve": "CVE-2025-71304",
      "id": "CVE-2025-71304",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: smack: /smack/doi: accept previously used values",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71304.json",
      "version": "3"
    }
  }
}



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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.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.