CVE-2026-49431: Freebsd

Low severity, CVSS 3.3. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Freebsd Freebsd: version 14.3 only; version 14.4 only; version 15.0 only; version 15.1 only

Published 2026-08-19. Last modified 2026-09-01.