CVE-2025-49177
Fixed in a distro release EPSS <1%CVSS 6.1
A flaw was found in the XFIXES extension. The XFixesSetClientDisconnectMode handler does not validate the request length, allowing a client to read unintended memory from previous requests.
Products: X.Org xwayland, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | xorg-x11-server-Xwayland | 24.1.5-4.el10_0 |
| AlmaLinux 10 | xorg-x11-server-Xwayland-devel | 24.1.5-4.el10_0 |
| Amazon Linux 2023 | tigervnc | 1.14.1-3.amzn2023.0.2 |
| Amazon Linux 2023 | tigervnc-icons | 1.14.1-3.amzn2023.0.2 |
| Amazon Linux 2023 | tigervnc-license | 1.14.1-3.amzn2023.0.2 |
| Amazon Linux 2023 | tigervnc-selinux | 1.14.1-3.amzn2023.0.2 |
| Amazon Linux 2023 | tigervnc-server | 1.14.1-3.amzn2023.0.2 |
| Amazon Linux 2023 | tigervnc-server-minimal | 1.14.1-3.amzn2023.0.2 |
| Amazon Linux 2023 | tigervnc-server-module | 1.14.1-3.amzn2023.0.2 |
| Amazon Linux 2023 | xorg-x11-server-Xephyr | 21.1.13-5.amzn2023.0.6 |
| Amazon Linux 2023 | xorg-x11-server-Xnest | 21.1.13-5.amzn2023.0.6 |
| Amazon Linux 2023 | xorg-x11-server-Xorg | 21.1.13-5.amzn2023.0.6 |
| Amazon Linux 2023 | xorg-x11-server-Xvfb | 21.1.13-5.amzn2023.0.6 |
| Amazon Linux 2023 | xorg-x11-server-Xwayland | 24.1.3-1.amzn2023.0.2 |
| Amazon Linux 2023 | xorg-x11-server-Xwayland-devel | 24.1.3-1.amzn2023.0.2 |
| Amazon Linux 2023 | xorg-x11-server-common | 21.1.13-5.amzn2023.0.6 |
| Amazon Linux 2023 | xorg-x11-server-devel | 21.1.13-5.amzn2023.0.6 |
| Amazon Linux 2023 | xorg-x11-server-source | 21.1.13-5.amzn2023.0.6 |
| Debian 12 | xorg-server | 2:21.1.7-3+deb12u10 |
| Debian 12 | xwayland | no fix |
| Debian 13 | xorg-server | 2:21.1.16-1.2 |
| Debian 13 | xwayland | no fix |
| Debian 14 | xorg-server | 2:21.1.16-1.2 |
| Debian 14 | xwayland | 2:24.1.8-1 |
| Red Hat Enterprise Linux 10.0 | xorg-x11-server-Xwayland | 0:24.1.5-4.el10_0 |
| Red Hat Enterprise Linux 10.0 | xorg-x11-server-Xwayland-debuginfo | 0:24.1.5-4.el10_0 |
| Red Hat Enterprise Linux 10.0 | xorg-x11-server-Xwayland-debugsource | 0:24.1.5-4.el10_0 |
| Red Hat Enterprise Linux 10.0 | xorg-x11-server-Xwayland-devel | 0:24.1.5-4.el10_0 |
| Red Hat Enterprise Linux 9 | xorg-x11-server | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xdmx | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xdmx-debuginfo | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xephyr | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xephyr-debuginfo | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xnest | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xnest-debuginfo | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xorg | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xorg-debuginfo | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xvfb | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xvfb-debuginfo | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xwayland | 0:23.2.7-4.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xwayland-debuginfo | 0:23.2.7-4.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xwayland-debugsource | 0:23.2.7-4.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-Xwayland-devel | 0:23.2.7-4.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-common | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-debuginfo | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-debugsource | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-devel | 0:1.20.11-31.el9_6 |
| Red Hat Enterprise Linux 9 | xorg-x11-server-source | 0:1.20.11-31.el9_6 |
| Red Hat rhel eus 9.4 | xorg-x11-server-Xwayland | 0:22.1.9-6.el9_4 |
| Red Hat rhel eus 9.4 | xorg-x11-server-Xwayland-debuginfo | 0:22.1.9-6.el9_4 |
| Red Hat rhel eus 9.4 | xorg-x11-server-Xwayland-debugsource | 0:22.1.9-6.el9_4 |
| Rocky Linux 10 | xorg-x11-server-Xwayland | 0:24.1.5-4.el10_0 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | xorg-x11-server | 21.1.4-150500.7.35.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | xorg-x11-server | 21.1.4-150500.7.35.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | xorg-x11-server | 21.1.11-150600.5.12.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | xorg-x11-server | 21.1.15-150700.5.3.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP6 | xorg-x11-server | 21.1.11-150600.5.12.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | xorg-x11-server | 21.1.15-150700.5.3.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | xorg-x11-server | 21.1.4-150500.7.35.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | xorg-x11-server | 21.1.4-150500.7.35.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP6 | xwayland | 24.1.1-150600.5.12.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP7 | xwayland | 24.1.5-150700.3.3.1 |
| Ubuntu 22.04 LTS | xorg-server | 2:21.1.4-2ubuntu1.7~22.04.15 |
| Ubuntu 22.04 LTS | xwayland | 2:22.1.1-1ubuntu0.19 |
| Ubuntu 24.04 LTS | xorg-server | 2:21.1.12-1ubuntu1.4 |
| Ubuntu 24.04 LTS | xwayland | 2:23.2.6-1ubuntu0.6 |
| Ubuntu 25.10 | xorg-server | 2:21.1.18-1ubuntu1 |
| Ubuntu 25.10 | xwayland | 2:24.1.6-1ubuntu1 |
| Ubuntu 26.04 LTS | xorg-server | 2:21.1.18-1ubuntu1 |
| Ubuntu 26.04 LTS | xwayland | 2:24.1.6-1ubuntu1 |
| Ubuntu Pro 14.04 LTS | xorg-server | no fix |
| Ubuntu Pro 16.04 LTS | xorg-server | no fix |
| Ubuntu Pro 16.04 LTS | xorg-server-hwe-16.04 | no fix |
| Ubuntu Pro 18.04 LTS | xorg-server | no fix |
| Ubuntu Pro 18.04 LTS | xorg-server-hwe-18.04 | no fix |
| Ubuntu Pro 20.04 LTS | xorg-server | no fix |
| openSUSE Leap 15.6 | xorg-x11-server | 21.1.11-150600.5.12.1 |
| openSUSE Leap 15.6 | xwayland | 24.1.1-150600.5.12.1 |
| openSUSE Tumbleweed | xorg-x11-server | 21.1.15-6.1 |
| openSUSE Tumbleweed | xwayland | 24.1.8-1.1 |