CVE-2026-49431CWE-863broken-access-control

CVE-2026-49431

Low · published August 19, 2026

CVSS v3.1
3.3
EPSS
0%
Percentile
1.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.3 · LOW
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00121 · 1.8th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-08-19T10:17Z
Affected products (38)
ProductVersionsFixed in
freebsd/freebsdall versions—
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References (1)
https://security.freebsd.org/advisories/FreeBSD-SA-26:40.zfs.asc · [email protected]
EPSS history
Timeline
  • 19 AUG 05:15Z
    Incorrect user validation in ZFS_IOC_SET_PROP ioctl
    cvelistv5