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Unity Linux 20.1070a Security Update: libssh (UTSA-2026-130121)

medium Nessus Plugin ID 365891

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-2026-130121 advisory.

 A flaw was found in libssh. A malicious SFTP server can send responses for unknown request IDs that libssh clients keep queued indefinitely, causing unbounded memory growth and client-side denial of service.

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 libssh package.

See Also

https://access.redhat.com/security/cve/CVE-2026-59848

https://nvd.nist.gov/vuln/detail/CVE-2026-59848

http://www.nessus.org/u?18491b47

Plugin Details

Severity: Medium

ID: 365891

File Name: unity_linux_UTSA-2026-130121.nasl

Version: 1.1

Type: Local

Published: 10/14/2026

Updated: 10/14/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-59848

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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: 10/15/2026

Vulnerability Publication Date: 7/21/2026

Reference Information

CVE: CVE-2026-59848