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Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987143)

medium Nessus Plugin ID 267959

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-2025-987143 advisory.

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

 MIPS: pgalloc: fix memory leak caused by pgd_free()

 pgd page is freed by generic implementation pgd_free() since commit f9cb654cb550 (asm-generic: pgalloc: provide generic pgd_free()), however, there are scenarios that the system uses more than one page as the pgd table, in such cases the generic implementation pgd_free() won't be applicable anymore. For example, when PAGE_SIZE_4KB is enabled and MIPS_VA_BITS_48 is not enabled in a 64bit system, the macro PGD_ORDER will be set as 1, which will cause allocating two pages as the pgd table. Well, at the same time, the generic implementation pgd_free() just free one pgd page, which will result in the memory leak.

 The memory leak can be easily detected by executing shell command:
 while true; do ls > /dev/null; grep MemFree /proc/meminfo; done

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.

See Also

http://www.nessus.org/u?c701e5c2

http://www.nessus.org/u?8bcbabf9

https://nvd.nist.gov/vuln/detail/CVE-2022-49210

Plugin Details

Severity: Medium

ID: 267959

File Name: unity_linux_UTSA-2025-987143.nasl

Version: 1.1

Type: local

Published: 10/7/2025

Updated: 10/7/2025

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-2022-49210

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: 9/23/2025

Vulnerability Publication Date: 7/19/2023

Reference Information

CVE: CVE-2022-49210