The vulnerability of the SyncChangeCounter() function in the Wayland protocol implementation for X.Org XWaylan, as well as in the X.Org Server implementation of the X Window System, allows a malicious actor to escalate their privileges and cause service failures.

The vulnerability of the SyncChangeCounter function in the Wayland protocol implementation for X.Org XWaylan, as well as in the X.Org Server implementation of the X Window System, is related to the possibility of using memory after it is freed. Exploiting this vulnerability can allow a malicious...

The vulnerability of the _XkbSetMapChecks() function in the Wayland protocol implementation for X.Org XWaylan, as well as in the X.Org Server implementation of the X Window System, allows a malicious actor to gain elevated privileges and cause service failures.

The vulnerability of the XkbSetMapChecks function in the Wayland protocol implementation for X.Org XWaylan, as well as in the X.Org Server implementation of the X Window System, is related to the execution of operations outside of the buffer in memory. Exploiting this vulnerability can allow...

The vulnerability of the miSyncDestroyFence() function in the Wayland protocol for X.Org XWaylan, as well as in the X.Org Server, allows a malicious actor to escalate their privileges and cause service failures.

The vulnerability of the miSyncDestroyFence function in the Wayland protocol for X.Org XWaylan, as well as in the X.Org Server, is related to the possibility of using memory after it is freed. Exploiting this vulnerability can allow a malicious actor to increase their privileges and cause service...

The vulnerability of the DRIGetBuffersWithFormat module in the Wayland protocol for X.Org XWaylan, as well as in the X.Org Server, allows a malicious actor to escalate their privileges and cause service failures.

The vulnerability of the DRIGetBuffersWithFormat module in the Wayland protocol for X.Org XWaylan, as well as in the X.Org Server, is related to buffer overflow attacks. Exploiting this vulnerability can allow attackers to gain elevated privileges and cause service interruptions...

[SECURITY] Fedora 43 Update: xorg-x11-server-Xwayland-24.1.12-1.fc43

Xwayland is an X server for running X clients under Wayland...

Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds read/write in glx changedrawableattributes

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Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()

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EUVD-2026-34817

A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter. A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or f...

CVE-2026-50261 Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()

A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter. A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or f...

CVE-2026-50257

A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence. A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection...

Important: Red Hat Security Advisory: tigervnc security update

An update for tigervnc is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

[SECURITY] Fedora 44 Update: xorg-x11-server-Xwayland-24.1.12-1.fc44

Xwayland is an X server for running X clients under Wayland...

openSUSE 16 Security Update : putty (openSUSE-SU-2026:20851-1)

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:20851-1 advisory. Changes in putty: - Update to release 0.84 Fixed a remotely triggerable double-free in RSA key exchange. Fixed a remotely triggerable crash assertion...

OPENSUSE-SU-2026:20851-1 Security update for putty

This update for putty fixes the following issues: Changes in putty: - Update to release 0.84 Fixed a remotely triggerable double-free in RSA key exchange. Fixed a remotely triggerable crash assertion failure - program termination in NIST ECDSA signature verification. Fixed marking of Telnet and...

PT-2026-48584

Уязвимость интерфейса libinput-device-group библиотеки libinput реализации протоколов серверов отображения X.Org и Wayland связана с неверным управлением генерацией кода. Эксплуатация уязвимости может позволить нарушителю повысить свои привилегии до уровня root и выполнить произвольный код...

RLSA-2026:19343 Important: xorg-x11-server security update

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Security Fixes: xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling...

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...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: drm/vmwgfx: Unmap the surface before resetting it on a plane state Switching to a new plane state requires unreferencing of all held surfaces. In the work required for mob cursors, the mapped surfaces started being cached, but...

Astra Linux – Vulnerability in Wayland

An internal reference count is maintained on the buffer pool; this count increments every time a new buffer is created from the pool. The reference count is stored as an integer. On LP64 systems, this can lead to an overflow if the client creates a large number of wlshm buffer objects, or if it...

Astra Linux – Vulnerability in Chromium

Before version 101.0.4951.41, using free after in the Ozone browser extension in Google Chrome allowed a remote attacker to potentially exploit heap corruption by running a Wayland test...