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Unity Linux 20.1070e Security Update: kernel (UTSA-2025-990919)

medium Nessus Plugin ID 275418

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-2025-990919 advisory.

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

 netfilter: nf_tables: adapt set backend to use GC transaction API

 Use the GC transaction API to replace the old and buggy gc API and the busy mark approach.

 No set elements are removed from async garbage collection anymore, instead the _DEAD bit is set on so the set element is not visible from lookup path anymore. Async GC enqueues transaction work that might be aborted and retried later.

 rbtree and pipapo set backends does not set on the _DEAD bit from the sync GC path since this runs in control plane path where mutex is held.
 In this case, set elements are deactivated, removed and then released via RCU callback, sync GC never fails.

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?b7899dd4

http://www.nessus.org/u?33b321e5

https://nvd.nist.gov/vuln/detail/CVE-2023-52923

Plugin Details

Severity: Medium

ID: 275418

File Name: unity_linux_UTSA-2025-990919.nasl

Version: 1.1

Type: local

Published: 11/14/2025

Updated: 11/14/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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-2023-52923

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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: 11/14/2025

Vulnerability Publication Date: 1/9/2024

Reference Information

CVE: CVE-2023-52923