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Unity Linux 20.1070e Security Update: kernel (UTSA-2025-990125)

medium Nessus Plugin ID 272434

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-2025-990125 advisory.

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

 fs/proc: fix softlockup in __read_vmcore (part 2)

 Since commit 5cbcb62dddf5 (fs/proc: fix softlockup in __read_vmcore) the number of softlockups in __read_vmcore at kdump time have gone down, but they still happen sometimes.

 In a memory constrained environment like the kdump image, a softlockup is not just a harmless message, but it can interfere with things like RCU freeing memory, causing the crashdump to get stuck.

 The second loop in __read_vmcore has a lot more opportunities for natural sleep points, like scheduling out while waiting for a data write to happen, but apparently that is not always enough.

 Add a cond_resched() to the second loop in __read_vmcore to (hopefully) get rid of the softlockups.

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?f45c64f7

http://www.nessus.org/u?d4f3b7c9

https://nvd.nist.gov/vuln/detail/CVE-2025-21694

Plugin Details

Severity: Medium

ID: 272434

File Name: unity_linux_UTSA-2025-990125.nasl

Version: 1.1

Type: local

Published: 11/5/2025

Updated: 11/5/2025

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-2025-21694

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: 11/5/2025

Vulnerability Publication Date: 12/12/2023

Reference Information

CVE: CVE-2025-21694