Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-000937)

medium Nessus Plugin ID 290421

Synopsis

The Unity Linux host is missing one or more security updates.

Description

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-000937 advisory.

fs/btrfs/inode.c in the Linux kernel before 4.3.3 mishandles compressed inline extents, which allows local users to obtain sensitive pre-truncation information from a file via a clone action.

Tenable has extracted the preceding description block directly from the Unity Linux 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 kernel package.

See Also

http://www.nessus.org/u?2bcf3d48

http://www.nessus.org/u?0a6aa56e

http://rhn.redhat.com/errata/RHSA-2016-2574.html

http://rhn.redhat.com/errata/RHSA-2016-2584.html

http://www.debian.org/security/2015/dsa-3426

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.3

http://www.openwall.com/lists/oss-security/2015/11/27/2

http://www.nessus.org/u?c85df308

http://www.nessus.org/u?cb8b72e0

http://www.securityfocus.com/bid/78219

http://www.securitytracker.com/id/1034895

http://www.ubuntu.com/usn/USN-2886-1

http://www.ubuntu.com/usn/USN-2887-1

http://www.ubuntu.com/usn/USN-2887-2

http://www.ubuntu.com/usn/USN-2888-1

http://www.ubuntu.com/usn/USN-2889-1

http://www.ubuntu.com/usn/USN-2889-2

http://www.ubuntu.com/usn/USN-2890-1

http://www.ubuntu.com/usn/USN-2890-2

http://www.ubuntu.com/usn/USN-2890-3

https://bugzilla.redhat.com/show_bug.cgi?id=1286261

http://www.nessus.org/u?3729474d

https://security-tracker.debian.org/tracker/CVE-2015-8374

Plugin Details

Severity: Medium

ID: 290421

File Name: unity_linux_UTSA-2026-000937.nasl

Version: 1.1

Type: local

Published: 1/16/2026

Updated: 1/16/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

CVSS Score Source: CVE-2015-8374

CVSS v3

Risk Factor: Medium

Base Score: 4

Temporal Score: 3.5

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

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

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/UOS-Server/release, Host/UOS-Server/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 1/14/2026

Vulnerability Publication Date: 10/16/2015

Reference Information

CVE: CVE-2015-8374