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Unity Linux 20.1070e Security Update: kernel (UTSA-2025-986988)

high Nessus Plugin ID 268837

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-2025-986988 advisory.

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

 iio: trigger: sysfs: fix use-after-free on remove

 Ensure that the irq_work has completed before the trigger is freed.

 ================================================================== BUG: KASAN: use-after-free in irq_work_run_list Read of size 8 at addr 0000000064702248 by task python3/25

 Call Trace:
 irq_work_run_list irq_work_tick update_process_times tick_sched_handle tick_sched_timer
 __hrtimer_run_queues hrtimer_interrupt

 Allocated by task 25:
 kmem_cache_alloc_trace iio_sysfs_trig_add dev_attr_store sysfs_kf_write kernfs_fop_write_iter new_sync_write vfs_write ksys_write sys_write

 Freed by task 25:
 kfree iio_sysfs_trig_remove dev_attr_store sysfs_kf_write kernfs_fop_write_iter new_sync_write vfs_write ksys_write sys_write

 ==================================================================

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?a95ca30c

http://www.nessus.org/u?4dc42a12

https://nvd.nist.gov/vuln/detail/CVE-2022-49685

Plugin Details

Severity: High

ID: 268837

File Name: unity_linux_UTSA-2025-986988.nasl

Version: 1.2

Type: local

Published: 10/7/2025

Updated: 10/15/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

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-2022-49685

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/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: 2/26/2025

Reference Information

CVE: CVE-2022-49685