CVE-2026-18358

HIGH
MEDIUM Priority: 0.05 BB Relevance: 75/100
Published: 2026-07-31 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

Description

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.

References & Advisories (4)

https://access.redhat.com/errata/RHSA-2026:54512
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:86194
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2462876
issue-tracking x_refsource_REDHAT

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.66%
Raw Score 0.006630
Percentile 52.3%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00663
2026-11-13
0.00663
2026-11-12
0.00663
2026-11-10
0.00663
2026-11-09
0.00663
2026-11-08
0.00663
2026-11-07
0.00663
2026-11-06
0.00663
2026-11-05
0.00663

Intelligence Sources

mitre ref →
nvd ref →