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Unity Linux 20.1070e Security Update: kernel (UTSA-2025-989708)

medium Nessus Plugin ID 272811

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-2025-989708 advisory.

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

 netfilter: conntrack: re-fetch conntrack after insertion

 In case the conntrack is clashing, insertion can free skb->_nfct and set skb->_nfct to the already-confirmed entry.

 This wasn't found before because the conntrack entry and the extension space used to free'd after an rcu grace period, plus the race needs events enabled to trigger.

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?9543b39d

http://www.nessus.org/u?e52754f9

https://nvd.nist.gov/vuln/detail/CVE-2022-49561

Plugin Details

Severity: Medium

ID: 272811

File Name: unity_linux_UTSA-2025-989708.nasl

Version: 1.1

Type: local

Published: 11/5/2025

Updated: 11/5/2025

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-2022-49561

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/cpu, Host/UOS-Server/release, Host/UOS-Server/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 11/5/2025

Vulnerability Publication Date: 7/15/2022

Reference Information

CVE: CVE-2022-49561