Integer overflow in X.org Server and Xwayland - CVE-2025-49179

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Main Vulnerability Database Vulnerabilities #VU111230

Integer overflow in X.org Server and Xwayland - CVE-2025-49179

Published: June 17, 2025


Vulnerability identifier: #VU111230
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-49179
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow within the RecordSanityCheckRegisterClients() function in in X Record extension. A local user can trigger an integer overflow and execute arbitrary code with elevated privileges. 


Affected software

X.org Server
Xwayland
Debian Linux
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP3
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Enterprise Storage
OpenBSD
Red Hat Enterprise Linux Server - AUS
Anolis OS
Red Hat CodeReady Linux Builder for IBM z Systems
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Basesystem Module
Development Tools Module
openSUSE Leap
Ubuntu
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
tigervnc (Red Hat package)
tigervnc-selinux
tigervnc-server
tigervnc-server-minimal
tigervnc-server-module
tigervnc-doc
tigervnc-icons
tigervnc-license
tigervnc
xorg-server (Ubuntu package)
xorg-x11-server-extra-debuginfo
xorg-x11-server-debuginfo
xorg-x11-server-debugsource
xorg-x11-server
xorg-x11-server-extra
xorg-x11-server-wayland-debuginfo
xorg-x11-server-wayland
xorg-x11-server-sdk
xorg-x11-server-source
xorg-x11-server (Red Hat package)
xorg-x11-server-Xephyr
xorg-x11-server-doc
xorg-x11-server-devel
xorg-x11-server-common
xorg-x11-server-Xvfb
xorg-x11-server-Xorg
xorg-x11-server-Xnest
xorg-x11-server-Xdmx
xorg-x11-server-Xwayland (Red Hat package)
xorg-x11-server-Xvfb-debuginfo
xorg-server (Debian package)
xorg-x11-server-Xwayland-doc
xorg-x11-server-Xwayland
xorg-x11-server-Xwayland-devel
xwayland-debugsource
xwayland
xwayland-devel
xwayland-debuginfo

How to mitigate CVE-2025-49179

Install updates from vendor's website.

X.org Server - update to 21.1.17
Xwayland - update to 24.1.7
tigervnc (Red Hat package) - addressed in versions 1.1.0-25.el6_10.1, 1.8.0-17.el7_7.1, 1.8.0-36.el7_9.2, 1.9.0-15.el8_2.14, 1.11.0-8.el8_4.13, 1.11.0-22.el9_0.15, 1.12.0-6.el8_6.14, 1.12.0-14.el9_2.12, 1.12.0-15.el8_8.14, 1.13.1-8.el9_4.7
tigervnc-selinux - addressed in versions 1.13.1-5, 1.15.0-7
tigervnc-server - addressed in versions 1.13.1-5, 1.15.0-7
tigervnc-server-minimal - addressed in versions 1.13.1-5, 1.15.0-7
tigervnc-server-module - addressed in versions 1.13.1-5, 1.15.0-7
tigervnc-doc - update to 1.13.1-5
tigervnc-icons - addressed in versions 1.13.1-5, 1.15.0-7
tigervnc-license - addressed in versions 1.13.1-5, 1.15.0-7
tigervnc - addressed in versions 1.13.1-5, 1.15.0-7
tigervnc - addressed in versions 1.15.0-6.fc41, 1.15.0-6.fc42
xorg-server (Ubuntu package) - addressed in versions 2:1.18.4-0ubuntu0.12+esm18, 2:1.19.6-1ubuntu4.1~16.04.6+esm10, 2:1.19.6-1ubuntu4.15+esm13, 2:1.20.8-2ubuntu2.2~18.04.11+esm5, 2:1.20.13-1ubuntu1~20.04.20+esm1, 2:21.1.4-2ubuntu1.7~22.04.15, 2:21.1.12-1ubuntu1.4, 2:21.1.13-2ubuntu1.4, 2:21.1.16-1ubuntu1.1, 2:22.1.1-1ubuntu0.19, 2:23.2.6-1ubuntu0.6, 2:24.1.2-1ubuntu0.6, 2:24.1.6-1ubuntu0.1
xorg-x11-server-extra-debuginfo - addressed in versions 1.19.6-10.83.1, 1.20.3-150200.22.5.105.1, 1.20.3-150400.38.57.1, 21.1.4-150500.7.35.1, 21.1.11-150600.5.12.1, 21.1.15-150700.5.3.1
xorg-x11-server-debuginfo - addressed in versions 1.19.6-10.83.1, 1.20.3-150200.22.5.105.1, 1.20.3-150400.38.57.1, 21.1.4-150500.7.35.1, 21.1.11-150600.5.12.1, 21.1.15-150700.5.3.1
xorg-x11-server-debugsource - addressed in versions 1.19.6-10.83.1, 1.20.3-150200.22.5.105.1, 1.20.3-150400.38.57.1, 21.1.4-150500.7.35.1, 21.1.11-150600.5.12.1, 21.1.15-150700.5.3.1
xorg-x11-server - addressed in versions 1.19.6-10.83.1, 1.20.3-150200.22.5.105.1, 1.20.3-150400.38.57.1, 21.1.4-150500.7.35.1, 21.1.11-150600.5.12.1, 21.1.15-150700.5.3.1
xorg-x11-server-extra - addressed in versions 1.19.6-10.83.1, 1.20.3-150200.22.5.105.1, 1.20.3-150400.38.57.1, 21.1.4-150500.7.35.1, 21.1.11-150600.5.12.1, 21.1.15-150700.5.3.1
xorg-x11-server-wayland-debuginfo - update to 1.20.3-150200.22.5.105.1
xorg-x11-server-wayland - update to 1.20.3-150200.22.5.105.1
xorg-x11-server-sdk - addressed in versions 1.20.3-150200.22.5.105.1, 1.20.3-150400.38.57.1, 21.1.4-150500.7.35.1, 21.1.11-150600.5.12.1, 21.1.15-150700.5.3.1
xorg-x11-server-source - addressed in versions 1.20.3-150400.38.57.1, 21.1.4-150500.7.35.1, 21.1.11-150600.5.12.1
xorg-x11-server (Red Hat package) - addressed in versions 1.20.4-32.el7_9, 1.20.6-4.el8_2, 1.20.10-2.el8_4, 1.20.11-5.el8_6.3, 1.20.11-11.el9_0, 1.20.11-16.el8_8, 1.20.11-18.el9_2, 1.20.11-26.el8_10, 1.20.11-26.el9_4, 1.20.11-31.el9_6
xorg-x11-server-Xephyr - addressed in versions 1.20.11-26.0.1, 1.20.14-15
xorg-x11-server-source - addressed in versions 1.20.11-26.0.1, 1.20.14-15
xorg-x11-server-doc - update to 1.20.11-26.0.1
xorg-x11-server-devel - addressed in versions 1.20.11-26.0.1, 1.20.14-15
xorg-x11-server-common - addressed in versions 1.20.11-26.0.1, 1.20.14-15
xorg-x11-server-Xvfb - addressed in versions 1.20.11-26.0.1, 1.20.14-15
xorg-x11-server-Xorg - addressed in versions 1.20.11-26.0.1, 1.20.14-15
xorg-x11-server-Xnest - addressed in versions 1.20.11-26.0.1, 1.20.14-15
xorg-x11-server-Xdmx - addressed in versions 1.20.11-26.0.1, 1.20.14-15
xorg-x11-server-Xwayland (Red Hat package) - addressed in versions 21.1.3-2.el8_6.4, 21.1.3-3.el9_0, 21.1.3-8.el9_2, 21.1.3-11.el8_8, 21.1.3-18.el8_10, 22.1.9-6.el9_4, 23.2.7-4.el9_6, 24.1.5-4.el10_0
xorg-x11-server-Xvfb - addressed in versions 21.1.4-150500.7.35.1, 21.1.11-150600.5.12.1, 21.1.15-150700.5.3.1
xorg-x11-server-Xvfb-debuginfo - addressed in versions 21.1.4-150500.7.35.1, 21.1.11-150600.5.12.1, 21.1.15-150700.5.3.1
xorg-server (Debian package) - update to 2:21.1.7-3+deb12u10
xorg-x11-server - addressed in versions 21.1.17-1.fc41, 21.1.17-1.fc42, 21.1.18-1.fc41, 21.1.18-1.fc42
xorg-x11-server-Xwayland-doc - update to 23.2.5-4
xorg-x11-server-Xwayland - addressed in versions 23.2.5-4, 23.2.7-4
xorg-x11-server-Xwayland-devel - update to 23.2.5-4
xwayland-debugsource - addressed in versions 24.1.1-150600.5.12.1, 24.1.5-150700.3.3.1
xwayland - addressed in versions 24.1.1-150600.5.12.1, 24.1.5-150700.3.3.1
xwayland-devel - update to 24.1.1-150600.5.12.1
xwayland-debuginfo - addressed in versions 24.1.1-150600.5.12.1, 24.1.5-150700.3.3.1
xorg-x11-server-Xwayland - addressed in versions 24.1.7-1.fc41, 24.1.7-1.fc42, 24.1.8-1.fc41, 24.1.8-1.fc42

External References

Related Security Bulletins