Description
A denial-of-service flaw was found in gnome-remote-desktop. An unauthenticated remote attacker can open RDP connections without completing the handshake and retain the connection-throttling slots indefinitely because no pre-authentication handshake deadline is enforced. By exhausting the global connection limit, an attacker can prevent new RDP clients from connecting until a holding socket is closed.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 10.2 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 9.8 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | gnome-remote-desktop | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | gnome-remote-desktop | No fix yet | — |
| Ubuntu 26.04 LTS | gnome-remote-desktop | No fix yet | — |
| Ubuntu 24.04 LTS | gnome-remote-desktop | No fix yet | — |
| Ubuntu 22.04 LTS | gnome-remote-desktop | No fix yet | — |
| Ubuntu 20.04 LTS | gnome-remote-desktop | No fix yet | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | gnome-remote-desktop | 47.3-1.amzn2023.0.5 | ALAS2023-2026-3393 |
Advisories 2
- WID-SEC-2026-4542 Red Hat Enterprise Linux: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- ALAS2023-2026-3393 Important: gnome-remote-desktop security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Nov 9, 2026
References
- RHSA-2026:98622 vendor-advisory
- RHSA-2026:99125 vendor-advisory
- RHSA-2026:99136 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-96541 vdb-entry
- RHBZ#2539385 issue-tracking
- https://gitlab.gnome.org/GNOME/gnome-remote-desktop/-/issues/356