CVE-2026-49431 — Incorrect user validation in ZFS_IOC_SET_PROP ioctl
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 da…
Published: 2026-08-19 · CVSS: 3.3 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7