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Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987106)

medium Nessus Plugin ID 268323

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-2025-987106 advisory.

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

 net: dsa: Fix possible memory leaks in dsa_loop_init()

 kmemleak reported memory leaks in dsa_loop_init():

 kmemleak: 12 new suspected memory leaks

 unreferenced object 0xffff8880138ce000 (size 2048):
 comm modprobe, pid 390, jiffies 4295040478 (age 238.976s) backtrace:
 [<000000006a94f1d5>] kmalloc_trace+0x26/0x60 [<00000000a9c44622>] phy_device_create+0x5d/0x970 [<00000000d0ee2afc>] get_phy_device+0xf3/0x2b0 [<00000000dca0c71f>] __fixed_phy_register.part.0+0x92/0x4e0 [<000000008a834798>] fixed_phy_register+0x84/0xb0 [<0000000055223fcb>] dsa_loop_init+0xa9/0x116 [dsa_loop] ...

 There are two reasons for memleak in dsa_loop_init().

 First, fixed_phy_register() create and register phy_device:

 fixed_phy_register() get_phy_device() phy_device_create() # freed by phy_device_free() phy_device_register() # freed by phy_device_remove()

 But fixed_phy_unregister() only calls phy_device_remove().
 So the memory allocated in phy_device_create() is leaked.

 Second, when mdio_driver_register() fail in dsa_loop_init(), it just returns and there is no cleanup for phydevs.

 Fix the problems by catching the error of mdio_driver_register() in dsa_loop_init(), then calling both fixed_phy_unregister() and phy_device_free() to release phydevs.
 Also add a function for phydevs cleanup to avoid duplacate.

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?e7a340ce

http://www.nessus.org/u?659144b5

https://nvd.nist.gov/vuln/detail/CVE-2022-49926

Plugin Details

Severity: Medium

ID: 268323

File Name: unity_linux_UTSA-2025-987106.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-2022-49926

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: 5/1/2025

Reference Information

CVE: CVE-2022-49926