CVE-2025-71304

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-71304", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-08T13:14:33.087Z", "datePublished": "2026-05-27T12:14:53.289Z", "dateUpdated": "2026-05-27T12:14:53.289Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:14:53.289Z"}, "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 \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!> (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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": 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"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"}], "title": "smack: /smack/doi: accept previously used values", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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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/$$/attr/smack/current\n # ping -c1 10.1.95.12\n 64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.617 ms\n\nThis happens because Smack keeps decommissioned DOIs,\nfails to re-add them, and consequently refuses to add\nthe \u201cdefault\u201d domain map:\n\n # netlabelctl -p cipso list\n Configured CIPSO mappings (2)\n DOI value : 3\n mapping type : PASS_THROUGH\n DOI value : 4\n mapping type : PASS_THROUGH\n # netlabelctl -p map list\n Configured NetLabel domain mappings (2)\n domain: \"_\" (IPv4)\n protocol: UNLABELED\n!> (no ipv4 map for default domain here)\n domain: DEFAULT (IPv6)\n protocol: UNLABELED\n\nFix by clearing decommissioned DOI definitions and\nserializing concurrent DOI updates with a new lock.\n\nAlso:\n- allow /smack/doi to live unconfigured, since\n adding a map (netlbl_cfg_cipsov4_map_add) may fail.\n CIPSO_V4_DOI_UNKNOWN(0) indicates the unconfigured DOI\n- add new DOI before removing the old default map,\n so the old map remains if the add fails\n\n(2008-02-04, Casey Schaufler)"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nsmack: /smack/doi: aceptar valores usados previamente\n\nEscribir en /smack/doi un valor que haya sido escrito all\u00ed en el pasado deshabilita la red para etiquetas no ambientales.\nPor ejemplo:\n\n # cat /smack/doi\n 3\n # netlabelctl -p cipso list\n Configured CIPSO mappings (1)\n DOI value : 3\n mapping type : PASS_THROUGH\n # netlabelctl -p map list\n Configured NetLabel domain mappings (3)\n domain: \u201c_\u201d (IPv4)\n protocol: UNLABELED\n domain: DEFAULT (IPv4)\n protocol: CIPSO, DOI = 3\n domain: DEFAULT (IPv6)\n protocol: UNLABELED\n\n # cat /smack/ambient\n _\n # cat /proc/$$/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\nEsto ocurre porque Smack mantiene los DOIs desmantelados, no logra volver a a\u00f1adirlos y, en consecuencia, se niega a a\u00f1adir el mapa de dominio 'default':\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: \u201c_\u201d (IPv4)\n protocol: UNLABELED\n!> (no hay mapa ipv4 para el dominio default aqu\u00ed)\n domain: DEFAULT (IPv6)\n protocol: UNLABELED\n\nSoluci\u00f3n al borrar las definiciones de DOI desmanteladas y serializar las actualizaciones concurrentes de DOI con un nuevo bloqueo.\n\nAdem\u00e1s:\n- permitir que /smack/doi permanezca sin configurar, ya que a\u00f1adir un mapa (netlbl_cfg_cipsov4_map_add) puede fallar. CIPSO_V4_DOI_UNKNOWN(0) indica el DOI no configurado\n- a\u00f1adir el nuevo DOI antes de eliminar el mapa 'default' antiguo, para que el mapa antiguo permanezca si la adici\u00f3n falla\n\n(2008-02-04, Casey Schaufler)"}], "id": "CVE-2025-71304", "lastModified": "2026-10-14T13:10:00.187", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-27T14:16:42.850", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: smack: /smack/doi: accept previously used values", "id": "2482016", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482016"}, "csaw": false, "cwe": "CWE-372", "details": ["A flaw was found in the Linux kernel's Smack module. A local user with privileges to modify Smack's Domain of Interpretation (DOI) values could cause a denial of service. By writing a previously used DOI value to `/smack/doi`, networking for non-ambient labels becomes disabled. This prevents network communication for processes operating under specific security contexts, leading to a denial of service for affected applications."], "name": "CVE-2025-71304", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-71304\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-71304\nhttps://lore.kernel.org/linux-cve-announce/2026052705-CVE-2025-71304-4972@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e114e473771c848c3cfec05f0123e70f1cdbdc99,eb718a3c8181ada679340db34cd61bce48e44749)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e114e473771c848c3cfec05f0123e70f1cdbdc99,6ec091c5c7eeabd249a7c46813cad1e9f555f859)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e114e473771c848c3cfec05f0123e70f1cdbdc99,199452f22d2f74b897fe826f81ec402b0a8461a0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e114e473771c848c3cfec05f0123e70f1cdbdc99,1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e114e473771c848c3cfec05f0123e70f1cdbdc99,33d589ed60ae433b483761987b85e0d24e54584e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e114e473771c848c3cfec05f0123e70f1cdbdc99,5a247a84de0ba44edbbd6be851c8a6b2aa60ff85)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e114e473771c848c3cfec05f0123e70f1cdbdc99,8beebb8ad9a003f978e53b06237986588223e15e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e114e473771c848c3cfec05f0123e70f1cdbdc99,f8071500177f38cff38892bd85ac631cc6e010b2)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.25"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.25)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.252,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.202,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.165,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.128,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.75,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.14,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.19.4,6.19.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-27T15:30:27.597298+00:00", "updated": "2026-08-12T02:15:17.766512+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}