CVE-2026-18358

Name	CVE-2026-18358
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
gnome-remote-desktop (PTS)	bookworm	43.3-1	fixed
	trixie	48.1-4	fixed
	forky, sid	51.0-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version
gnome-remote-desktop	source	bookworm	(not affected)
gnome-remote-desktop	source	trixie	(not affected)
gnome-remote-desktop	source	(unstable)	(unfixed)

Notes

[trixie] - gnome-remote-desktop <not-affected> (Vulnerable code not present)
[bookworm] - gnome-remote-desktop <not-affected> (Vulnerable code not present)
https://bugzilla.redhat.com/show_bug.cgi?id=2462876
Introduced after:  https://gitlab.gnome.org/GNOME/gnome-remote-desktop/-/commit/959cd39ae528a6751d94b0dcff173a470a5bc7ef  (50.beta)