xorg-x11-server security update

1.20.11-34.3 - CVE fix for CVE-2026-55999 Resolves: https://redhat.atlassian.net/browse/RHEL-191493...

[SECURITY] Fedora 44 Update: xorg-x11-server-21.1.24-1.fc44

X.Org X11 X server...

xorg-x11-server-Xwayland security, bug fix, and enhancement update

An update is available for xorg-x11-server-Xwayland. This update affects Rocky Linux 9. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list Xwayland is an X server for running X clients under Wayland...

xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption

A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially...

EUVD-2026-25230

A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially...

Wayland Protocol present_create_notifies Code Execution

The vulnerability of the presentcreatenotifies function in the implementation of the Wayland protocol for X.Org XWayland, as well as in the implementation of the X Window System Server, is related to the use of memory after it is freed. Exploiting this vulnerability can allow a attacker to execut...

Wayland Protocol XkbSetCompatMap DoS

The vulnerability of the XkbSetCompatMap function in the Wayland protocol implementation for X.Org XWayland, as well as in the X.Org Server implementation of the X Window System, is related to a numerical overflow condition. Exploiting this vulnerability can allow an attacker to cause a service...

xorg-server buffer error vulnerability

xorg-x11-server is an X Window System display server from the X.org Foundation. A security vulnerability exists in xorg-server versions prior to 21.1.10, xwayland versions prior to 23.2.3, which stems from a memory read/write overrun that may be caused by querying or changing an XKB button...

PT-2023-6642

Name of the Vulnerable Software and Affected Versions xorg-x11-server affected versions not specified Description A use-after-free flaw was found in the xorg-x11-server, which can cause an X server crash in a very specific and legacy configuration, known as Zaphod mode, where a multi-screen setup...

xorg-x11-server: SProcScreenSaverSuspend out-of-bounds access

A flaw was found in xorg-x11-server where an out-of-bounds access can occur in the SProcScreenSaverSuspend function...

Privilege Escalation

kernel is vulnerable to privilege escalation. The vulnerability exists when an application has a stack overflow, the stack could silently overwrite another memory mapped area instead of a segmentation fault occurring, which could cause an application to execute arbitrary code, possibly leading to...

ALPINE-CVE-2017-13721

In X.Org Server aka xserver and xorg-server before 1.19.4, an attacker authenticated to an X server with the X shared memory extension enabled can cause aborts of the X server or replace shared memory segments of other X clients in the same session...