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Unity Linux 20.1070a Security Update: kernel (UTSA-2025-988980)

high Nessus Plugin ID 272955

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-2025-988980 advisory.

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

 dm raid: fix accesses beyond end of raid member array

 On dm-raid table load (using raid_ctr), dm-raid allocates an array rs->devs[rs->raid_disks] for the raid device members. rs->raid_disks is defined by the number of raid metadata and image tupples passed into the target's constructor.

 In the case of RAID layout changes being requested, that number can be different from the current number of members for existing raid sets as defined in their superblocks. Example RAID layout changes include:
 - raid1 legs being added/removed
 - raid4/5/6/10 number of stripes changed (stripe reshaping)
 - takeover to higher raid level (e.g. raid5 -> raid6)

 When accessing array members, rs->raid_disks must be used in control loops instead of the potentially larger value in rs->md.raid_disks.
 Otherwise it will cause memory access beyond the end of the rs->devs array.

 Fix this by changing code that is prone to out-of-bounds access.
 Also fix validate_raid_redundancy() to validate all devices that are added. Also, use braces to help clean up raid_iterate_devices().

 The out-of-bounds memory accesses was discovered using KASAN.

 This commit was verified to pass all LVM2 RAID tests (with KASAN enabled).

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?98be30a1

http://www.nessus.org/u?8862a239

https://nvd.nist.gov/vuln/detail/CVE-2022-49674

Plugin Details

Severity: High

ID: 272955

File Name: unity_linux_UTSA-2025-988980.nasl

Version: 1.1

Type: local

Published: 11/5/2025

Updated: 11/5/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:N/A:C

CVSS Score Source: CVE-2022-49674

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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: 7/21/2022

Reference Information

CVE: CVE-2022-49674