{"apiVersion":"1.0","identifier":"CVE-2026-49429","description":"The ZFS_IOC_USERSPACE_MANY ioctl, used by zfs-userspace(8), truncated a 64-bit output buffer size to a 32-bit integer for the kernel allocation, but used the original 64-bit size as the buffer limit when writing records. A local user with the -userused- delegated ZFS permission can trigger a kernel heap overflow via the ZFS_IOC_USERSPACE_MANY ioctl, potentially escalating privileges.","publishedAt":"2026-08-19T06:17:42","lastModifiedAt":"2026-08-26T16:54:50","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-49429","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00165,"riskScore":0.79,"affectedProduct":"ZFS","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-49429","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-49429","en":"https://www.redsauce.net/en/cves/CVE-2026-49429","fr":"https://www.redsauce.net/fr/cves/CVE-2026-49429","pt":"https://www.redsauce.net/pt/cves/CVE-2026-49429","de":"https://www.redsauce.net/de/cves/CVE-2026-49429","sk":"https://www.redsauce.net/sk/cves/CVE-2026-49429","el":"https://www.redsauce.net/el/cves/CVE-2026-49429"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-49429"}}