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Unity Linux 20.1070e Security Update: kernel (UTSA-2025-990792)

medium Nessus Plugin ID 275147

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-2025-990792 advisory.

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

 macvlan: enforce a consistent minimal mtu

 macvlan should enforce a minimal mtu of 68, even at link creation.

 This patch avoids the current behavior (which could lead to crashes in ipv6 stack if the link is brought up)

 $ ip link add macvlan1 link eno1 mtu 8 type macvlan # This should fail ! $ ip link sh dev macvlan1 5: macvlan1@eno1: <BROADCAST,MULTICAST> mtu 8 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 02:47:6c:24:74:82 brd ff:ff:ff:ff:ff:ff $ ip link set macvlan1 mtu 67 Error: mtu less than device minimum.
 $ ip link set macvlan1 mtu 68 $ ip link set macvlan1 mtu 8 Error: mtu less than device minimum.

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?036d604d

http://www.nessus.org/u?f047dcc8

https://nvd.nist.gov/vuln/detail/CVE-2022-49776

Plugin Details

Severity: Medium

ID: 275147

File Name: unity_linux_UTSA-2025-990792.nasl

Version: 1.1

Type: local

Published: 11/12/2025

Updated: 11/12/2025

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-2022-49776

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: 11/12/2025

Vulnerability Publication Date: 1/23/2023

Reference Information

CVE: CVE-2022-49776