Detections
Analytics

Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : OpenZFS vulnerability (USN-8705-1)

high Nessus Plugin ID 365433

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8705-1 advisory.

 It was discovered that OpenZFS incorrectly handled authorization checks for certain ioctl operations on Linux. A local attacker could possibly use this issue to perform pool-administrative operations or access privileged information, resulting in an authorization bypass.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-8705-1

Plugin Details

Severity: High

ID: 365433

File Name: ubuntu_USN-8705-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/13/2026

Updated: 10/13/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.25

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-79619

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.3

Threat Score: 4.4

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libnvpair3linux, p-cpe:/a:canonical:ubuntu_linux:libpam-zfs, p-cpe:/a:canonical:ubuntu_linux:libuutil3linux, p-cpe:/a:canonical:ubuntu_linux:libzfs4linux, p-cpe:/a:canonical:ubuntu_linux:libzfs7linux, p-cpe:/a:canonical:ubuntu_linux:libzfsbootenv1linux, p-cpe:/a:canonical:ubuntu_linux:libzpool5linux, p-cpe:/a:canonical:ubuntu_linux:libzpool7linux, p-cpe:/a:canonical:ubuntu_linux:python3-pyzfs, p-cpe:/a:canonical:ubuntu_linux:zfs-dkms, p-cpe:/a:canonical:ubuntu_linux:zfs-dracut, p-cpe:/a:canonical:ubuntu_linux:zfs-initramfs, p-cpe:/a:canonical:ubuntu_linux:zfs-test, p-cpe:/a:canonical:ubuntu_linux:zfs-zed, p-cpe:/a:canonical:ubuntu_linux:zfsutils-linux

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Ease: No known exploits are available

Patch Publication Date: 8/31/2026

Vulnerability Publication Date: 8/26/2026

Reference Information

CVE: CVE-2026-79619

USN: 8705-1