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.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-2068 advisory.

    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. (CVE-2026-18358)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 10 host has a package installed that is affected by a vulnerability as referenced in the ALSA-2026:54512 advisory.

    * gnome-remote-desktop: gnome-remote-desktop system-mode RDP server missing connection throttling allows     unauthenticated denial of service (CVE-2026-18358)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote RockyLinux 10 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:54512 advisory.

    * gnome-remote-desktop: gnome-remote-desktop system-mode RDP server missing connection throttling allows     unauthenticated denial of service (CVE-2026-18358)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 10 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2026-54512 advisory.

    [49.3-4]
    - Backport connection throttling

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 10 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:54512 advisory.

    GNOME Remote Desktop is a remote desktop and screen sharing service for the GNOME desktop environment.

    Security Fix(es):

    * gnome-remote-desktop: gnome-remote-desktop system-mode RDP server missing connection throttling allows     unauthenticated denial of service (CVE-2026-18358)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-18358)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
337237	Amazon Linux 2023 : gnome-remote-desktop (ALAS2023-2026-2068)	Nessus	Amazon Linux Local Security Checks	Local	high
335435	AlmaLinux 10 : gnome-remote-desktop (ALSA-2026:54512)	Nessus	Alma Linux Local Security Checks	Local	high
335422	RockyLinux 10 : gnome-remote-desktop (RLSA-2026:54512)	Nessus	Rocky Linux Local Security Checks	Local	high
335324	Oracle Linux 10 : gnome-remote-desktop (ELSA-2026-54512)	Nessus	Oracle Linux Local Security Checks	Local	high
335124	RHEL 10 : gnome-remote-desktop (RHSA-2026:54512)	Nessus	Red Hat Local Security Checks	Local	high
331479	Linux Distros Unpatched Vulnerability : CVE-2026-18358	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-18358

high

Tenable Plugins

high

high

high

high

high

high