Vulnerability Details CVE-2026-49431
The ZFS_IOC_SET_PROP ioctl, used by zfs-set(8), incorrectly validated the calling user such that an unprivileged user is able to set metadata on a dataset indicating that the dataset has received properties from a zfs-recv(8) stream.
Any local user can set the internal ZFS metadata flag "$hasrecvd" on datasets via ZFS_IOC_SET_PROP.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 1.9%
CVSS Severity
CVSS v3 Score 3.3