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Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992897)

high Nessus Plugin ID 281149

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-2025-992897 advisory.

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

 netfilter: ipset: Fix race between namespace cleanup and gc in the list:set type

 Lion Ackermann reported that there is a race condition between namespace cleanup in ipset and the garbage collection of the list:set type. The namespace cleanup can destroy the list:set type of sets while the gc of the set type is waiting to run in rcu cleanup. The latter uses data from the destroyed set which thus leads use after free. The patch contains the following parts:

 - When destroying all sets, first remove the garbage collectors, then wait if needed and then destroy the sets.
 - Fix the badly ordered wait then remove gc for the destroy a single set case.
 - Fix the missing rcu locking in the list:set type in the userspace test case.
 - Use proper RCU list handlings in the list:set type.

 The patch depends on c1193d9bbbd3 (netfilter: ipset: Add list flush to cancel_gc).

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?291814a4

http://www.nessus.org/u?ad2d376e

https://nvd.nist.gov/vuln/detail/CVE-2024-39503

Plugin Details

Severity: High

ID: 281149

File Name: unity_linux_UTSA-2025-992897.nasl

Version: 1.1

Type: local

Published: 12/31/2025

Updated: 12/31/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.4

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

CVSS Score Source: CVE-2024-39503

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

Vector: CVSS:3.0/AV:L/AC:H/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: 12/31/2025

Vulnerability Publication Date: 4/9/2024

Reference Information

CVE: CVE-2024-39503