Detections
Analytics

Unity Linux 20.1050e Security Update: kernel (UTSA-2026-005057)

high Nessus Plugin ID 296800

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-2026-005057 advisory.

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

 tty: n_gsm: fix possible out-of-bounds in gsm0_receive()

 Assuming the following:
 - side A configures the n_gsm in basic option mode
 - side B sends the header of a basic option mode frame with data length 1
 - side A switches to advanced option mode
 - side B sends 2 data bytes which exceeds gsm->len Reason: gsm->len is not used in advanced option mode.
 - side A switches to basic option mode
 - side B keeps sending until gsm0_receive() writes past gsm->buf Reason: Neither gsm->state nor gsm->len have been reset after reconfiguration.

 Fix this by changing gsm->count to gsm->len comparison from equal to less than. Also add upper limit checks against the constant MAX_MRU in gsm0_receive() and gsm1_receive() to harden against memory corruption of gsm->len and gsm->mru.

 All other checks remain as we still need to limit the data according to the user configuration and actual payload size.

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?350b2816

http://www.nessus.org/u?a61e42ba

https://nvd.nist.gov/vuln/detail/CVE-2024-36016

Plugin Details

Severity: High

ID: 296800

File Name: unity_linux_UTSA-2026-005057.nasl

Version: 1.1

Type: local

Published: 1/27/2026

Updated: 1/27/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

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

CVSS Score Source: CVE-2024-36016

CVSS v3

Risk Factor: High

Base Score: 7.7

Temporal Score: 6.7

Vector: CVSS:3.0/AV:L/AC:L/PR:N/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/UOS-Server/release, Host/UOS-Server/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 1/27/2026

Vulnerability Publication Date: 5/29/2024

Reference Information

CVE: CVE-2024-36016