Detections
Analytics

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-992665)

medium Nessus Plugin ID 280293

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-2025-992665 advisory.

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

 x86/mm: Fix flush_tlb_range() when used for zapping normal PMDs

 On the following path, flush_tlb_range() can be used for zapping normal PMD entries (PMD entries that point to page tables) together with the PTE entries in the pointed-to page table:

 collapse_pte_mapped_thp pmdp_collapse_flush flush_tlb_range

 The arm64 version of flush_tlb_range() has a comment describing that it can be used for page table removal, and does not use any last-level invalidation optimizations. Fix the X86 version by making it behave the same way.

 Currently, X86 only uses this information for the following two purposes, which I think means the issue doesn't have much impact:

 - In native_flush_tlb_multi() for checking if lazy TLB CPUs need to be IPI'd to avoid issues with speculative page table walks.
 - In Hyper-V TLB paravirtualization, again for lazy TLB stuff.

 The patch x86/mm: only invalidate final translations with INVLPGB which is currently under review (see <https://lore.kernel.org/all/[email protected]/>) would probably be making the impact of this a lot worse.

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?f44d0440

http://www.nessus.org/u?7e7efe2e

https://nvd.nist.gov/vuln/detail/CVE-2025-22045

Plugin Details

Severity: Medium

ID: 280293

File Name: unity_linux_UTSA-2025-992665.nasl

Version: 1.1

Type: local

Published: 12/30/2025

Updated: 12/30/2025

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-2025-22045

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/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: 4/16/2025

Reference Information

CVE: CVE-2025-22045