CVE-2026-49421

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"7296F5AA-F8C1-4277-A4EE-C2B24073A320", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p11:*:*:*:*:*:*", "matchCriteriaId": "C30E4A9C-0594-4F40-92B3-26CB9AA85AE9", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p12:*:*:*:*:*:*", "matchCriteriaId": "9F83F91B-587A-433C-99DB-0D63E267FF16", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p13:*:*:*:*:*:*", "matchCriteriaId": "44B9C2FC-756E-459F-8E68-C2C2B8C258AC", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p14:*:*:*:*:*:*", "matchCriteriaId": "A11526CF-505E-47DF-8388-65CB216D2022", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p15:*:*:*:*:*:*", "matchCriteriaId": "632175D0-5327-4458-8968-8FA39D00F236", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:*", "matchCriteriaId": "242FA2A8-5D7D-4617-A411-2651FF3A3E4C", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:*", "matchCriteriaId": "40573F60-F3B7-4AEC-846A-B08E5B7D9D00", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:*", "matchCriteriaId": "1FB832CE-0A98-44A2-8BAC-CD38A64279B6", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:*", "matchCriteriaId": "9A785F8E-C218-41AE-8D57-BF06DDAEF7CB", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:*", "matchCriteriaId": "C3909FDD-B2A2-45B6-A40B-1D303A717F15", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p7:*:*:*:*:*:*", "matchCriteriaId": "720597A2-F181-46E1-8A0D-097E17ADC4FB", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p8:*:*:*:*:*:*", "matchCriteriaId": "DC8A75D0-148A-427A-9783-45477EABED21", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p9:*:*:*:*:*:*", "matchCriteriaId": "F5D39FC9-6DBA-46C8-BB80-A6188E6A8527", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:*", "matchCriteriaId": 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"75973F7C-645A-438C-A03B-C77AAAD20C15", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The kernel function that implements unlinkat(2) and funlinkat(2) validated the AT_RESOLVE_BENEATH flag but failed to pass it through to the underlying path lookup. The flag was silently dropped, so path resolution was not actually restricted.\n\nA process that uses AT_RESOLVE_BENEATH with unlinkat(2) or funlinkat(2) to confine path resolution can in fact resolve paths above the starting directory. A caller relying on this flag for path containment may delete files outside the intended directory tree."}, {"lang": "es", "value": "La funci\u00f3n del kernel que implementa unlinkat(2) y funlinkat(2) valid\u00f3 la bandera AT_RESOLVE_BENEATH pero no logr\u00f3 pasarla a la b\u00fasqueda de ruta subyacente. La bandera fue descartada silenciosamente, por lo que la resoluci\u00f3n de ruta no estaba realmente restringida.\n\nUn proceso que utiliza AT_RESOLVE_BENEATH con unlinkat(2) o funlinkat(2) para confinar la resoluci\u00f3n de ruta puede de hecho resolver rutas por encima del directorio de inicio. Un llamador que conf\u00eda en esta bandera para la contenci\u00f3n de rutas puede eliminar archivos fuera del \u00e1rbol de directorios previsto."}], "id": "CVE-2026-49421", "lastModified": "2026-11-09T20:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49421", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-26T17:44:11.280156Z", "version": "2.0.3"}}]}, "published": "2026-08-19T06:17:41.160", "references": [{"source": "secteam@freebsd.org", "tags": ["Vendor Advisory"], "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:42.unlinkat.asc"}], "sourceIdentifier": "secteam@freebsd.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-273"}], "source": "secteam@freebsd.org", "type": "Secondary"}]}

{}

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