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Unity Linux 20.1050e Security Update: kernel (UTSA-2026-006804)

medium Nessus Plugin ID 305458

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-2026-006804 advisory.

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

 block: avoid possible overflow for chunk_sectors check in blk_stack_limits()

 In blk_stack_limits(), we check that the t->chunk_sectors value is a multiple of the t->physical_block_size value.

 However, by finding the chunk_sectors value in bytes, we may overflow the unsigned int which holds chunk_sectors, so change the check to be based on sectors.

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?4575eeb2

http://www.nessus.org/u?3d221290

https://nvd.nist.gov/vuln/detail/CVE-2025-39795

Plugin Details

Severity: Medium

ID: 305458

File Name: unity_linux_UTSA-2026-006804.nasl

Version: 1.1

Type: Local

Published: 4/8/2026

Updated: 4/8/2026

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-2025-39795

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: 4/8/2026

Vulnerability Publication Date: 6/10/2025

Reference Information

CVE: CVE-2025-39795