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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 CPE status
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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          "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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      "title": "smack: /smack/doi: accept previously used values",
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    "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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      "date": "2026-09-16",
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   _\\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"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T13:38:37Z",
      "cve": "CVE-2025-71304",
      "id": "CVE-2025-71304",
      "initial_release_date": "2026-05-28T04:01:28Z",
      "product_status:known_affected": "111",
      "product_status:known_not_affected": "274",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-71304",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-71304.json",
      "version": "7"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.