RHSA-2026:54512Vendor advisory
https://access.redhat.com/errata/RHSA-2026:54512 CVE-2026-18358
HIGH
Gnome-remote-desktop: gnome-remote-desktop system-mode rdp server missing connection throttling allows unauthenticated denial of service
Record summary
CVE-2026-18358 has a selected CVSS score of 7.5 (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.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationNone
AutomatableYes
Technical impactPartial
CISA Coordinator · SSVC 2.0.3 · Evaluated Jul 31, 2026 · Source: CVE List
Affected products and versions
4| Product | Source | Version range | Status |
|---|---|---|---|
gnome-remote-desktopBrowse GNOME / gnome-remote-desktopDefault status: unaffected | CVE List | Version data not supplied | |
Default status: affected | CVE List | 0:49.3-4.el10_2 to < * | unaffected |
Default status: unaffected | CVE List | Version data not supplied | |
Default status: unaffected | CVE List | Version data not supplied | |
References
4access.redhat.comvdb entry
https://access.redhat.com/security/cve/CVE-2026-18358 RHBZ#2462876issue tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2462876 nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2026-18358