Unity Linux 20.1070a Security Update: kernel (UTSA-2025-986365)

high Nessus Plugin ID 267950

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-2025-986365 advisory.

In the Linux kernel, the following vulnerability has been resolved:

Revert Revert block, bfq: honor already-setup queue merges

A crash [1] happened to be triggered in conjunction with commit 2d52c58b9c9b (block, bfq: honor already-setup queue merges). The latter was then reverted by commit ebc69e897e17 (Revert block, bfq:
honor already-setup queue merges). Yet, the reverted commit was not the one introducing the bug. In fact, it actually triggered a UAF introduced by a different commit, and now fixed by commit d29bd41428cf (block, bfq: reset last_bfqq_created on group change).

So, there is no point in keeping commit 2d52c58b9c9b (block, bfq:
honor already-setup queue merges) out. This commit restores it.

[1] https://bugzilla.kernel.org/show_bug.cgi?id=214503

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.

Plugin Details

Severity: High

ID: 267950

File Name: unity_linux_UTSA-2025-986365.nasl

Version: 1.1

Type: local

Family: Unity Linux Local Security Checks

Published: 10/7/2025

Updated: 10/7/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2021-47646

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

Vulnerability Information

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/22/2025

Vulnerability Publication Date: 11/15/2022

Reference Information

CVE: CVE-2021-47646

Detections

Analytics