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Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-992185)

high Nessus Plugin ID 280454

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-2025-992185 advisory.

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

 scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()

 When executing SMP task failed, the smp_execute_task_sg() calls del_timer() to delete slow_task->timer. However, if the timer handler sas_task_internal_timedout() is running, the del_timer() in smp_execute_task_sg() will not stop it and a UAF will happen. The process is shown below:

 (thread 1) | (thread 2) smp_execute_task_sg() | sas_task_internal_timedout() ... | del_timer() | ... | ...
 sas_free_task(task) | kfree(task->slow_task) //FREE| | task->slow_task->... //USE

 Fix by calling del_timer_sync() in smp_execute_task_sg(), which makes sure the timer handler have finished before the task->slow_task is deallocated.

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?ba529061

http://www.nessus.org/u?bde47873

https://nvd.nist.gov/vuln/detail/CVE-2022-50422

Plugin Details

Severity: High

ID: 280454

File Name: unity_linux_UTSA-2025-992185.nasl

Version: 1.1

Type: local

Published: 12/30/2025

Updated: 12/30/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2022-50422

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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: 12/30/2025

Vulnerability Publication Date: 9/4/2021

Reference Information

CVE: CVE-2022-50422