{"apiVersion":"1.0","identifier":"CVE-2026-49421","description":"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. A 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.","publishedAt":"2026-08-19T06:17:41","lastModifiedAt":"2026-08-26T18:16:35","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-49421","cvssScore":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","epssProbability":0.0009,"riskScore":0.72,"affectedProduct":"FreeBSD","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-49421","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-49421","en":"https://www.redsauce.net/en/cves/CVE-2026-49421","fr":"https://www.redsauce.net/fr/cves/CVE-2026-49421","pt":"https://www.redsauce.net/pt/cves/CVE-2026-49421","de":"https://www.redsauce.net/de/cves/CVE-2026-49421","sk":"https://www.redsauce.net/sk/cves/CVE-2026-49421","el":"https://www.redsauce.net/el/cves/CVE-2026-49421"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-49421"}}