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...

Fedora 42 : xorg-x11-server (2026-2c6941716b)

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-2c6941716b advisory. Update to xserver 21.1.22, CVE fix for: CVE-2026-33999, CVE-2026-34000, CVE-2026-34001, CVE-2026-34002, CVE-2026-34003 Tenable has extracted the...

EUVD-2026-25231

A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash,...

CVE-2026-34003

A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash,...

CVE-2026-34003

The CVE-2026-34003 issue is a local, out-of-bounds/ buffer-overflow in the XKB key types validation of the X.Org X server (Xwayland included in affected stacks). Public reports enumerate XKB Buffer overflow in CheckKeyTypes() as the root cause, leading to possible information disclosure and Denia...

CVE-2026-34001 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...

X.Org X Server 数字错误漏洞

X.Org X Server is an X Window system display server developed by the X.Org Foundation. X.Org X Server has a numerical error vulnerability, which stems from integer underflow in the XKB compatibility mapping process. This vulnerability may allow attackers to trigger a buffer overflow, leading to...

[SECURITY] Fedora 43 Update: xorg-x11-server-Xwayland-24.1.10-1.fc43

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

PT-2026-46940

Name of the Vulnerable Software and Affected Versions X.Org X server affected versions not specified Xwayland affected versions not specified Description A use-after-free flaw exists in the FreeCounter function. This occurs when a client establishes multiple SyncCounters and awaits their triggers...

PT-2026-46942

Name of the Vulnerable Software and Affected Versions X.Org X server affected versions not specified Xwayland affected versions not specified Description An out-of-bounds read flaw exists in the glXDisp ChangeDrawableAttributes function. Due to an incorrect size validation check, the system may...

[slackware-security] tigervnc

New tigervnc packages are available for Slackware 15.0 and -current to fix security issues. Here are the details from the Slackware 15.0 ChangeLog: extra/tigervnc/tigervnc-1.16.2-i586-2slack15.0.txz: Rebuilt. Rebuilt against xorg-server-1.20.14 patched to fix security issues: XKB Integer Underflo...

FreeBSD : xwayland -- Multiple vulnerabilities (099423d1-3815-11f1-a284-589cfc10a551)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 099423d1-3815-11f1-a284-589cfc10a551 advisory. X.Org project reports: Multiple issues have been found in the X server and Xwayland...

OPENSUSE-SU-2026:20544-1 Security update for xorg-x11-server

This update for xorg-x11-server fixes the following issues: - CVE-2026-33999: XKB Integer Underflow in XkbSetCompatMap bsc1260922. - CVE-2026-34000: XKB Out-of-bounds Read in CheckSetGeom bsc1260923. - CVE-2026-34001: XSYNC Use-after-free in miSyncTriggerFence bsc1260924. - CVE-2026-34002: XKB...

Slackware: Security Advisory (SSA:2026-104-02)

The remote host is missing an update for the SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

[slackware-security] xorg-server

New xorg-server packages are available for Slackware 15.0 and -current to fix security issues. Here are the details from the Slackware 15.0 ChangeLog: patches/packages/xorg-server-1.20.14-i586-19slack15.0.txz: Rebuilt. This update fixes security issues: XKB Integer Underflow in XkbSetCompatMap. X...

SUSE-SU-2026:1330-1 Security update for xorg-x11-server

This update for xorg-x11-server fixes the following issues: - CVE-2026-33999: XKB Integer Underflow in XkbSetCompatMap bsc1260922. - CVE-2026-34000: XKB Out-of-bounds Read in CheckSetGeom bsc1260923. - CVE-2026-34001: XSYNC Use-after-free in miSyncTriggerFence bsc1260924. - CVE-2026-34002: XKB...

Linux Distros Unpatched Vulnerability : CVE-2026-33999

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local ...

Slackware Linux 15.0 / current xorg-server Multiple Vulnerabilities (SSA:2026-104-02)

The version of xorg-server installed on the remote host is prior to 1.20.14 / 21.1.22 / 21.1.4 / 24.1.10. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2026-104-02 advisory. New xorg-server packages are available for Slackware 15.0 and -current to fix security...

Linux Distros Unpatched Vulnerability : CVE-2026-34003

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to a...

Linux Distros Unpatched Vulnerability : CVE-2026-34001

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...