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Unity Linux 20.1050e Security Update: kernel (UTSA-2026-006606)

medium Nessus Plugin ID 305484

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-2026-006606 advisory.

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

 kobject: Add sanity check for kset->kobj.ktype in kset_register()

 When I register a kset in the following way:
 static struct kset my_kset;
 kobject_set_name(&my_kset.kobj, my_kset);
 ret = kset_register(&my_kset);

 A null pointer dereference exception is occurred:
 [ 4453.568337] Unable to handle kernel NULL pointer dereference at \ virtual address 0000000000000028 ... ...
 [ 4453.810361] Call trace:
 [ 4453.813062] kobject_get_ownership+0xc/0x34 [ 4453.817493] kobject_add_internal+0x98/0x274 [ 4453.822005] kset_register+0x5c/0xb4 [ 4453.825820] my_kobj_init+0x44/0x1000 [my_kset] ... ...

 Because I didn't initialize my_kset.kobj.ktype.

 According to the description in Documentation/core-api/kobject.rst:
 - A ktype is the type of object that embeds a kobject. Every structure that embeds a kobject needs a corresponding ktype.

 So add sanity check to make sure kset->kobj.ktype is not NULL.

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?d30f671c

http://www.nessus.org/u?9b982daf

https://nvd.nist.gov/vuln/detail/CVE-2023-53480

Plugin Details

Severity: Medium

ID: 305484

File Name: unity_linux_UTSA-2026-006606.nasl

Version: 1.1

Type: Local

Published: 4/8/2026

Updated: 4/8/2026

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-2023-53480

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: 4/8/2026

Vulnerability Publication Date: 7/21/2021

Reference Information

CVE: CVE-2023-53480