Description
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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FreeBSD | FreeBSD | 15.1-RELEASE – < p1, 15.0-RELEASE – < p11, 14.4-RELEASE – < p7, 14.3-RELEASE – < p16 | p1 |
Advisories 1
- WID-SEC-2026-2165 FreeBSD Project FreeBSD OS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 19, 2026
References
- https://security.freebsd.org/advisories/FreeBSD-SA-26:40.zfs.asc vendor-advisory