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Unity Linux 20.1070a Security Update: kernel (UTSA-2025-988951)

medium Nessus Plugin ID 272827

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-2025-988951 advisory.

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

 phy: mdio: fix memory leak

 Syzbot reported memory leak in MDIO bus interface, the problem was in wrong state logic.

 MDIOBUS_ALLOCATED indicates 2 states:
 1. Bus is only allocated 2. Bus allocated and __mdiobus_register() fails, but device_register() was called

 In case of device_register() has been called we should call put_device() to correctly free the memory allocated for this device, but mdiobus_free() calls just kfree(dev) in case of MDIOBUS_ALLOCATED state

 To avoid this behaviour we need to set bus->state to MDIOBUS_UNREGISTERED
 _before_ calling device_register(), because put_device() should be called even in case of device_register() failure.

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?e9f9761a

http://www.nessus.org/u?a90f43bc

https://nvd.nist.gov/vuln/detail/CVE-2021-47416

Plugin Details

Severity: Medium

ID: 272827

File Name: unity_linux_UTSA-2025-988951.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: 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-2021-47416

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/UOS-Server/release, Host/UOS-Server/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 11/5/2025

Vulnerability Publication Date: 1/28/2022

Reference Information

CVE: CVE-2021-47416