EUVD-2026-62241
GHSA-hrxx-hfqm-f933
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Local unprivileged access only, limited to single internal metadata flag; no confidentiality or availability impact confirmed.
Primary rating from Vendor (freebsd).
CVSS VectorVendor: freebsd
Lifecycle Timeline
3DescriptionCVE.org
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 "$hasrecvd" on datasets via ZFS_IOC_SET_PROP.
AnalysisAI
Incorrect authorization in FreeBSD's ZFS_IOC_SET_PROP ioctl allows any local unprivileged user to set the internal '$hasrecvd' metadata flag on ZFS datasets - a capability that should be restricted to privileged ZFS receive operations. Affected release lines span FreeBSD 14.3, 14.4, 15.0, and 15.1 prior to their respective patch levels, as confirmed by FreeBSD Security Advisory FreeBSD-SA-26:40.zfs. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | A local user account on the affected FreeBSD system is required (CVSS PR:L confirmed). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is low. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary fix is to apply the FreeBSD security patches for the relevant release branch: upgrade to FreeBSD 15.0-RELEASE-p11, 15.1-RELEASE-p1, 14.4-RELEASE-p7, or 14.3-RELEASE-p16 as applicable, following instructions in FreeBSD Security Advisory FreeBSD-SA-26:40.zfs at https://security.freebsd.org/advisories/FreeBSD-SA-26:40.zfs.asc. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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