Description
A flaw was found in gnome-remote-desktop as shipped in Red Hat Enterprise Linux. In the VNC TLS I/O handlers, retryable GnuTLS results (GNUTLS_E_AGAIN and GNUTLS_E_INTERRUPTED) are handled with an unbounded busy loop instead of yielding to the event loop. A remote attacker who can reach an enabled VNC TLS listener can cause the event-loop thread to spin at high CPU with no forward progress, resulting in denial of service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 9.8 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
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.
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 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | gnome-remote-desktop | 40.0-13.el9_9 | RHSA-2026:98510 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.8 EUS | gnome-remote-desktop | 40.0-13.el9_8 | RHSA-2026:99136 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | gnome-remote-desktop | 40.0-13.el9_9 | RLSA-2026:98510 |
Advisories 4
- RHSA-2026:99136 Red Hat Security Advisory: gnome-remote-desktop security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:98510 Red Hat Security Advisory: gnome-remote-desktop security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RLSA-2026:98510 Important: gnome-remote-desktop security update Rocky Linux Security Advisories · Nov 13, 2026
- WID-SEC-2026-4542 Red Hat Enterprise Linux: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
References
- RHSA-2026:98510 vendor-advisory
- RHSA-2026:99136 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-109832 vdb-entry
- RHBZ#2550352 issue-tracking