{"id":"CVE-2025-71304","state":"PUBLISHED","title":"smack: /smack/doi: accept previously used values","description":"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)","publishedAt":"2026-05-27T12:14:53.289Z","updatedAt":"2026-05-27T12:14:53.289Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"eb718a3c8181ada679340db34cd61bce48e44749","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"6ec091c5c7eeabd249a7c46813cad1e9f555f859","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"199452f22d2f74b897fe826f81ec402b0a8461a0","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"f8071500177f38cff38892bd85ac631cc6e010b2","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"5a247a84de0ba44edbbd6be851c8a6b2aa60ff85","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"8beebb8ad9a003f978e53b06237986588223e15e","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"33d589ed60ae433b483761987b85e0d24e54584e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/smack/smackfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.25","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.25","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/smack/smackfs.c"]}],"references":["https://git.kernel.org/stable/c/eb718a3c8181ada679340db34cd61bce48e44749","https://git.kernel.org/stable/c/6ec091c5c7eeabd249a7c46813cad1e9f555f859","https://git.kernel.org/stable/c/199452f22d2f74b897fe826f81ec402b0a8461a0","https://git.kernel.org/stable/c/1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3","https://git.kernel.org/stable/c/f8071500177f38cff38892bd85ac631cc6e010b2","https://git.kernel.org/stable/c/5a247a84de0ba44edbbd6be851c8a6b2aa60ff85","https://git.kernel.org/stable/c/8beebb8ad9a003f978e53b06237986588223e15e","https://git.kernel.org/stable/c/33d589ed60ae433b483761987b85e0d24e54584e"],"weaknesses":[],"ingestedAt":"2026-10-29T20:10:04.440Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/71xxx/CVE-2025-71304.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-71304","state":"PUBLISHED","datePublished":"2026-05-27T12:14:53.289Z","dateUpdated":"2026-05-27T12:14:53.289Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-08T13:14:33.087Z"},"containers":{"cna":{"title":"smack: /smack/doi: accept previously used values","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)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"eb718a3c8181ada679340db34cd61bce48e44749","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"6ec091c5c7eeabd249a7c46813cad1e9f555f859","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"199452f22d2f74b897fe826f81ec402b0a8461a0","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"f8071500177f38cff38892bd85ac631cc6e010b2","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"5a247a84de0ba44edbbd6be851c8a6b2aa60ff85","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"8beebb8ad9a003f978e53b06237986588223e15e","versionType":"git"},{"version":"e114e473771c848c3cfec05f0123e70f1cdbdc99","status":"affected","lessThan":"33d589ed60ae433b483761987b85e0d24e54584e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/smack/smackfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.25","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.25","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/smack/smackfs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/eb718a3c8181ada679340db34cd61bce48e44749"},{"url":"https://git.kernel.org/stable/c/6ec091c5c7eeabd249a7c46813cad1e9f555f859"},{"url":"https://git.kernel.org/stable/c/199452f22d2f74b897fe826f81ec402b0a8461a0"},{"url":"https://git.kernel.org/stable/c/1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3"},{"url":"https://git.kernel.org/stable/c/f8071500177f38cff38892bd85ac631cc6e010b2"},{"url":"https://git.kernel.org/stable/c/5a247a84de0ba44edbbd6be851c8a6b2aa60ff85"},{"url":"https://git.kernel.org/stable/c/8beebb8ad9a003f978e53b06237986588223e15e"},{"url":"https://git.kernel.org/stable/c/33d589ed60ae433b483761987b85e0d24e54584e"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-27T12:14:53.289Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"5.10.252"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"5.15.202"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}