{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-71304", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-71304", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2026-05-27T12:14:53.289Z", "updatedAt": "2026-05-27T12:14:53.289Z", "importedAt": "2026-10-24T01:57:44.935Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "smack: /smack/doi: accept previously used values", "summary": "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", "versionType": "git", "lessThan": "eb718a3c8181ada679340db34cd61bce48e44749" }, { "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99", "status": "affected", "versionType": "git", "lessThan": "6ec091c5c7eeabd249a7c46813cad1e9f555f859" }, { "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99", "status": "affected", "versionType": "git", "lessThan": "199452f22d2f74b897fe826f81ec402b0a8461a0" }, { "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99", "status": "affected", "versionType": "git", "lessThan": "1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3" }, { "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99", "status": "affected", "versionType": "git", "lessThan": "f8071500177f38cff38892bd85ac631cc6e010b2" }, { "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99", "status": "affected", "versionType": "git", "lessThan": "5a247a84de0ba44edbbd6be851c8a6b2aa60ff85" }, { "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99", "status": "affected", "versionType": "git", "lessThan": "8beebb8ad9a003f978e53b06237986588223e15e" }, { "version": "e114e473771c848c3cfec05f0123e70f1cdbdc99", "status": "affected", "versionType": "git", "lessThan": "33d589ed60ae433b483761987b85e0d24e54584e" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.25", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.25" }, { "version": "5.10.252", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.202", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.165", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.128", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.75", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.14", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "6.19.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.19.*" }, { "version": "7.0", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }