Incorrect user validation in ZFS_IOC_SET_PROP ioctl
Summary
| CVE | CVE-2026-49431 |
|---|---|
| State | PUBLISHED |
| Assigner | freebsd |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-19 06:17:43 UTC |
| Updated | 2026-08-19 06:17:43 UTC |
| 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. |
Risk And Classification
Problem Types: CWE-863 | CWE-863 CWE-863: Incorrect Authorization
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | FreeBSD | FreeBSD | affected 15.1-RELEASE p1 release | Not specified |
| CNA | FreeBSD | FreeBSD | affected 15.0-RELEASE p11 release | Not specified |
| CNA | FreeBSD | FreeBSD | affected 14.4-RELEASE p7 release | Not specified |
| CNA | FreeBSD | FreeBSD | affected 14.3-RELEASE p16 release | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| security.freebsd.org/advisories/FreeBSD-SA-26:40.zfs.asc | [email protected] | security.freebsd.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Yuxiang Yang, Yizhou Zhao, Ao Wang, Xuewei Feng, Qi Li, and Ke Xu from Tsinghua University using GLM-5.1 from Z.ai (en)
CNA: Emmanuel Genier at Quarkslab (en)
There are currently no legacy QID mappings associated with this CVE.