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Unity Linux 20.1070a Security Update: kernel (UTSA-2025-988966)

medium Nessus Plugin ID 272872

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-2025-988966 advisory.

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

 net: can: j1939: enhanced error handling for tightly received RTS messages in xtp_rx_rts_session_new

 This patch enhances error handling in scenarios with RTS (Request to Send) messages arriving closely. It replaces the less informative WARN_ON_ONCE backtraces with a new error handling method. This provides clearer error messages and allows for the early termination of problematic sessions.
 Previously, sessions were only released at the end of j1939_xtp_rx_rts().

 Potentially this could be reproduced with something like:
 testj1939 -r vcan0:0x80 & while true; do # send first RTS cansend vcan0 18EC8090#1014000303002301;
 # send second RTS cansend vcan0 18EC8090#1014000303002301;
 # send abort cansend vcan0 18EC8090#ff00000000002301;
 done

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?377909b0

http://www.nessus.org/u?992c7b29

https://nvd.nist.gov/vuln/detail/CVE-2023-52887

Plugin Details

Severity: Medium

ID: 272872

File Name: unity_linux_UTSA-2025-988966.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-2023-52887

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: 7/17/2024

Reference Information

CVE: CVE-2023-52887