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Vulnerability · Published Jun 17, 2025 · Assigned by redhat

CVE-2025-49176Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in big requests extension

High 7.3

In plain English

A high-severity integer overflow in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.4%top 69.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in the Big Requests extension. The request length is multiplied by 4 before checking against the maximum allowed size, potentially causing an integer overflow and bypassing the size check.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8tigervnc1.15.0-7.el8_10ALSA-2025:9392
AlmaLinux:9tigervnc1.14.1-8.el9_6ALSA-2025:9306
AlmaLinux:8tigervnc-icons1.15.0-7.el8_10ALSA-2025:9392
AlmaLinux:9tigervnc-icons1.14.1-8.el9_6ALSA-2025:9306
AlmaLinux:8tigervnc-license1.15.0-7.el8_10ALSA-2025:9392
AlmaLinux:9tigervnc-license1.14.1-8.el9_6ALSA-2025:9306
AlmaLinux:8tigervnc-selinux1.15.0-7.el8_10ALSA-2025:9392
AlmaLinux:9tigervnc-selinux1.14.1-8.el9_6ALSA-2025:9306
AlmaLinux:8tigervnc-server1.15.0-7.el8_10ALSA-2025:9392
AlmaLinux:9tigervnc-server1.14.1-8.el9_6ALSA-2025:9306
AlmaLinux:8tigervnc-server-minimal1.15.0-7.el8_10ALSA-2025:9392
AlmaLinux:9tigervnc-server-minimal1.14.1-8.el9_6ALSA-2025:9306
AlmaLinux:8tigervnc-server-module1.15.0-7.el8_10ALSA-2025:9392
AlmaLinux:9tigervnc-server-module1.14.1-8.el9_6ALSA-2025:9306
AlmaLinux:8xorg-x11-server-Xdmx1.20.11-26.el8_10ALSA-2025:9305
AlmaLinux:9xorg-x11-server-Xdmx1.20.11-31.el9_6ALSA-2025:9303
AlmaLinux:8xorg-x11-server-Xephyr1.20.11-26.el8_10ALSA-2025:9305
AlmaLinux:9xorg-x11-server-Xephyr1.20.11-31.el9_6ALSA-2025:9303
AlmaLinux:8xorg-x11-server-Xnest1.20.11-26.el8_10ALSA-2025:9305
AlmaLinux:9xorg-x11-server-Xnest1.20.11-31.el9_6ALSA-2025:9303
AlmaLinux:8xorg-x11-server-Xorg1.20.11-26.el8_10ALSA-2025:9305
AlmaLinux:9xorg-x11-server-Xorg1.20.11-31.el9_6ALSA-2025:9303
AlmaLinux:8xorg-x11-server-Xvfb1.20.11-26.el8_10ALSA-2025:9305
AlmaLinux:9xorg-x11-server-Xvfb1.20.11-31.el9_6ALSA-2025:9303
AlmaLinux:10xorg-x11-server-Xwayland24.1.5-4.el10_0ALSA-2025:9304
AlmaLinux:8xorg-x11-server-Xwayland21.1.3-18.el8_10ALSA-2025:9305
AlmaLinux:9xorg-x11-server-Xwayland23.2.7-4.el9_6ALSA-2025:9303
AlmaLinux:10xorg-x11-server-Xwayland-devel24.1.5-4.el10_0ALSA-2025:9304
AlmaLinux:9xorg-x11-server-Xwayland-devel23.2.7-4.el9_6ALSA-2025:9303
AlmaLinux:8xorg-x11-server-common1.20.11-26.el8_10ALSA-2025:9305
AlmaLinux:9xorg-x11-server-common1.20.11-31.el9_6ALSA-2025:9303
AlmaLinux:8xorg-x11-server-devel1.20.11-26.el8_10ALSA-2025:9305
AlmaLinux:9xorg-x11-server-devel1.20.11-31.el9_6ALSA-2025:9303
AlmaLinux:8xorg-x11-server-source1.20.11-26.el8_10ALSA-2025:9305
AlmaLinux:9xorg-x11-server-source1.20.11-31.el9_6ALSA-2025:9303
Alpine:v3.22xorg-server21.1.17-r0ALPINE-CVE-2025-49176
Alpine:v3.23xorg-server21.1.17-r0ALPINE-CVE-2025-49176
Alpine:v3.24xorg-server21.1.17-r0ALPINE-CVE-2025-49176
Alpine:v3.22xwayland24.1.7-r0ALPINE-CVE-2025-49176
Alpine:v3.23xwayland24.1.7-r0ALPINE-CVE-2025-49176
Alpine:v3.24xwayland24.1.7-r0ALPINE-CVE-2025-49176
Debian:12xorg-server2:21.1.7-3+deb12u10DSA-5947-1
Debian:12xorg-server2:21.1.7-3+deb12u10DEBIAN-CVE-2025-49176
Debian:13xorg-server2:21.1.16-1.3DEBIAN-CVE-2025-49176
Debian:14xorg-server2:21.1.16-1.3DEBIAN-CVE-2025-49176
Debian:12xwaylandno fix listedDEBIAN-CVE-2025-49176
Debian:13xwaylandno fix listedDEBIAN-CVE-2025-49176
Debian:14xwayland2:24.1.8-1DEBIAN-CVE-2025-49176
Rocky Linux:8tigervnc0:1.15.0-7.el8_10RLSA-2025:9392
Rocky Linux:9tigervnc0:1.14.1-8.el9_6RLSA-2025:9306
Rocky Linux:8xorg-x11-server0:1.20.11-26.el8_10RLSA-2025:9305
Rocky Linux:9xorg-x11-server0:1.20.11-31.el9_6RLSA-2025:9303
Rocky Linux:10xorg-x11-server-Xwayland0:24.1.5-4.el10_0RLSA-2025:9304
Rocky Linux:8xorg-x11-server-Xwayland0:21.1.3-18.el8_10RLSA-2025:9305
Rocky Linux:9xorg-x11-server-Xwayland0:23.2.7-4.el9_6RLSA-2025:9303
Ubuntu:22.04:LTSxorg-server2:21.1.4-2ubuntu1.7~22.04.15USN-7573-1
Ubuntu:22.04:LTSxorg-server2:21.1.4-2ubuntu1.7~22.04.15UBUNTU-CVE-2025-49176
Ubuntu:24.04:LTSxorg-server2:21.1.12-1ubuntu1.4USN-7573-1
Ubuntu:24.04:LTSxorg-server2:21.1.12-1ubuntu1.4UBUNTU-CVE-2025-49176
Ubuntu:25.10xorg-server2:21.1.18-1ubuntu1UBUNTU-CVE-2025-49176
Ubuntu:26.04:LTSxorg-server2:21.1.18-1ubuntu1UBUNTU-CVE-2025-49176
Ubuntu:22.04:LTSxwayland2:22.1.1-1ubuntu0.19UBUNTU-CVE-2025-49176
Ubuntu:22.04:LTSxwayland2:22.1.1-1ubuntu0.19USN-7573-1
Ubuntu:24.04:LTSxwayland2:23.2.6-1ubuntu0.6USN-7573-1
Ubuntu:24.04:LTSxwayland2:23.2.6-1ubuntu0.6UBUNTU-CVE-2025-49176
Ubuntu:25.10xwayland2:24.1.6-1ubuntu1UBUNTU-CVE-2025-49176
Ubuntu:26.04:LTSxwayland2:24.1.6-1ubuntu1UBUNTU-CVE-2025-49176

Affected products (as reported)

VendorProductVersions
X.Org xwayland 0 – before 24.1.7
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION see references
Red Hat Red Hat Enterprise Linux 7.7 Advanced Update Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support see references
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references

Weakness: CWE-190 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

References