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Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-107265)

medium Nessus Plugin ID 344956

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-2026-107265 advisory.

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

 md: Don't ignore read-only array in md_check_recovery()

 Usually if the array is not read-write, md_check_recovery() won't register new sync_thread in the first place. And if the array is read-write and sync_thread is registered, md_set_readonly() will unregister sync_thread before setting the array read-only. md/raid follow this behavior hence there is no problem.

 After commit f52f5c71f3d4 (md: fix stopping sync thread), following hang can be triggered by test shell/integrity-caching.sh:

 1) array is read-only. dm-raid update super block:
 rs_update_sbs ro = mddev->ro mddev->ro = 0
 -> set array read-write md_update_sb

 2) register new sync thread concurrently.

 3) dm-raid set array back to read-only:
 rs_update_sbs mddev->ro = ro

 4) stop the array:
 raid_dtr md_stop stop_sync_thread set_bit(MD_RECOVERY_INTR, &mddev->recovery);
 md_wakeup_thread_directly(mddev->sync_thread);
 wait_event(..., !test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))

 5) sync thread done:
 md_do_sync set_bit(MD_RECOVERY_DONE, &mddev->recovery);
 md_wakeup_thread(mddev->thread);

 6) daemon thread can't unregister sync thread:
 md_check_recovery if (!md_is_rdwr(mddev) && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) return;
 -> -> MD_RECOVERY_RUNNING can't be cleared, hence step 4 hang;

 The root cause is that dm-raid manipulate 'mddev->ro' by itself, however, dm-raid really should stop sync thread before setting the array read-only. Unfortunately, I need to read more code before I can refacter the handler of 'mddev->ro' in dm-raid, hence let's fix the problem the easy way for now to prevent dm-raid regression.

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

https://nvd.nist.gov/vuln/detail/CVE-2024-26757

http://www.nessus.org/u?508d39ba

http://www.nessus.org/u?5720c3db

Plugin Details

Severity: Medium

ID: 344956

File Name: unity_linux_UTSA-2026-107265.nasl

Version: 1.1

Type: Local

Published: 9/11/2026

Updated: 9/11/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

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-2024-26757

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: 9/11/2026

Vulnerability Publication Date: 4/3/2024

Reference Information

CVE: CVE-2024-26757