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Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990585)

medium Nessus Plugin ID 274214

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-2025-990585 advisory.

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

 x86/speculation: Fill RSB on vmexit for IBRS

 Prevent RSB underflow/poisoning attacks with RSB. While at it, add a bunch of comments to attempt to document the current state of tribal knowledge about RSB attacks and what exactly is being mitigated.

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?7c1e38b1

http://www.nessus.org/u?3f4d7c7a

https://nvd.nist.gov/vuln/detail/CVE-2022-49611

Plugin Details

Severity: Medium

ID: 274214

File Name: unity_linux_UTSA-2025-990585.nasl

Version: 1.1

Type: local

Published: 11/6/2025

Updated: 11/6/2025

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-2022-49611

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: 11/6/2025

Vulnerability Publication Date: 9/13/2022

Reference Information

CVE: CVE-2022-49611