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Unity Linux 20.1050e Security Update: kernel (UTSA-2026-021535)

medium Nessus Plugin ID 315842

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-2026-021535 advisory.

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

 driver core: fix resource leak in device_add()

 When calling kobject_add() failed in device_add(), it will call cleanup_glue_dir() to free resource. But in kobject_add(), dev->kobj.parent has been set to NULL. This will cause resource leak.

 The process is as follows:
 device_add() get_device_parent() class_dir_create_and_add() kobject_add() //kobject_get() ...
 dev->kobj.parent = kobj;
 ...
 kobject_add() //failed, but set dev->kobj.parent = NULL ...
 glue_dir = get_glue_dir(dev) //glue_dir = NULL, and goto //Error label ...
 cleanup_glue_dir() //becaues glue_dir is NULL, not call //kobject_put()

 The preceding problem may cause insmod mac80211_hwsim.ko to failed.
 sysfs: cannot create duplicate filename '/devices/virtual/mac80211_hwsim' Call Trace:
 <TASK> dump_stack_lvl+0x8e/0xd1 sysfs_warn_dup.cold+0x1c/0x29 sysfs_create_dir_ns+0x224/0x280 kobject_add_internal+0x2aa/0x880 kobject_add+0x135/0x1a0 get_device_parent+0x3d7/0x590 device_add+0x2aa/0x1cb0 device_create_groups_vargs+0x1eb/0x260 device_create+0xdc/0x110 mac80211_hwsim_new_radio+0x31e/0x4790 [mac80211_hwsim] init_mac80211_hwsim+0x48d/0x1000 [mac80211_hwsim] do_one_initcall+0x10f/0x630 do_init_module+0x19f/0x5e0 load_module+0x64b7/0x6eb0
 __do_sys_finit_module+0x140/0x200 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 </TASK> kobject_add_internal failed for mac80211_hwsim with -EEXIST, don't try to register things with the same name in the same directory.

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?5e3b0680

http://www.nessus.org/u?368959e5

https://nvd.nist.gov/vuln/detail/CVE-2023-53594

Plugin Details

Severity: Medium

ID: 315842

File Name: unity_linux_UTSA-2026-021535.nasl

Version: 1.1

Type: Local

Published: 5/20/2026

Updated: 5/20/2026

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-2023-53594

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: 5/21/2026

Vulnerability Publication Date: 3/22/2023

Reference Information

CVE: CVE-2023-53594