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Linux Distros Unpatched Vulnerability : CVE-2026-18358

high Nessus Plugin ID 331479

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - A flaw was found in gnome-remote-desktop as shipped in Red Hat Enterprise Linux. When the daemon is running in system mode with RDP enabled, the incoming connection handler bypasses the connection throttler, allowing an unauthenticated remote attacker to open many parallel pre-authentication connections to the RDP listener. This can accumulate accepted sockets and pending routing-token operations until timeout, exhausting resources and preventing legitimate users from establishing RDP sessions. This issue does not affect the upstream version. (CVE-2026-18358)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-18358

https://security-tracker.debian.org/tracker/CVE-2026-18358

Plugin Details

Severity: High

ID: 331479

File Name: unpatched_CVE_2026_18358.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 7/31/2026

Updated: 7/31/2026

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

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

CVSS Score Source: CVE-2026-18358

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.9

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

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:debian:debian_linux:gnome-remote-desktop, p-cpe:/a:redhat:enterprise_linux:gnome-remote-desktop

Required KB Items: global_settings/vendor_unpatched, Host/OS/identifier, Host/cpu, Host/local_checks_enabled

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 7/31/2026

Reference Information

CVE: CVE-2026-18358