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CVE-2026-49431

Incorrect user validation in ZFS_IOC_SET_PROP ioctl

Low3.3EPSS 0.12%
Published
Updated
Reserved
Assigned by
freebsd

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.

Timeline

  1. ID reserved

    By freebsd

  2. · 3 months later

    Published

  3. · 7 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-49431, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1Low3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
NVDNVD · Analyzed3.1Low3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS (exploitation in 30 days)
0.12% · top 98% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.3.

Weakness

Affected products

  • FreeBSD · FreeBSD

    • affected 15.1-RELEASE – < p1
    • affected 15.0-RELEASE – < p11
    • affected 14.4-RELEASE – < p7
    • affected 14.3-RELEASE – < p16

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .