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Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989138)

medium Nessus Plugin ID 273065

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-2025-989138 advisory.

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

 configfs: fix a race in configfs_{,un}register_subsystem()

 When configfs_register_subsystem() or configfs_unregister_subsystem() is executing link_group() or unlink_group(), it is possible that two processes add or delete list concurrently.
 Some unfortunate interleavings of them can cause kernel panic.

 One of cases is:
 A --> B --> C --> D A <-- B <-- C <-- D

 delete list_head *B | delete list_head *C
 --------------------------------|----------------------------------- configfs_unregister_subsystem | configfs_unregister_subsystem unlink_group | unlink_group unlink_obj | unlink_obj list_del_init | list_del_init
 __list_del_entry | __list_del_entry
 __list_del | __list_del // next == C | next->prev = prev | | next->prev = prev prev->next = next | | // prev == B | prev->next = next

 Fix this by adding mutex when calling link_group() or unlink_group(), but parent configfs_subsystem is NULL when config_item is root.
 So I create a mutex configfs_subsystem_mutex.

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?65dff281

http://www.nessus.org/u?97493242

https://nvd.nist.gov/vuln/detail/CVE-2022-48931

Plugin Details

Severity: Medium

ID: 273065

File Name: unity_linux_UTSA-2025-989138.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: Low

Base Score: 3.8

Temporal Score: 2.8

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

CVSS Score Source: CVE-2022-48931

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.1

Vector: CVSS:3.0/AV:L/AC:H/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: 4/7/2022

Reference Information

CVE: CVE-2022-48931