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Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987590)

medium Nessus Plugin ID 270924

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-2025-987590 advisory.

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

 mxser: fix xmit_buf leak in activate when LSR == 0xff

 When LSR is 0xff in ->activate() (rather unlike), we return an error.
 Provided ->shutdown() is not called when ->activate() fails, nothing actually frees the buffer in this case.

 Fix this by properly freeing the buffer in a designated label. We jump there also from the !info->type if now too.

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?25d389eb

http://www.nessus.org/u?000699e9

https://nvd.nist.gov/vuln/detail/CVE-2022-49191

Plugin Details

Severity: Medium

ID: 270924

File Name: unity_linux_UTSA-2025-987590.nasl

Version: 1.1

Type: local

Published: 10/21/2025

Updated: 10/21/2025

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-2022-49191

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: 10/15/2025

Vulnerability Publication Date: 2/26/2025

Reference Information

CVE: CVE-2022-49191