RHEL 9 : tigervnc (RHSA-2026:21741)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:21741 advisory. Virtual Network Computing VNC is a remote display system which allows users to view a computing desktop environment not only on the machine...

xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling

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 or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of servi...

MGASA-2026-0155 Updated x11-server, x11-server-xwayland & tigervnc packages fix security vulnerabilities

XKB Integer Underflow in XkbSetCompatMap. CVE-2026-33999 XKB Out-of-bounds Read in CheckSetGeom. CVE-2026-34000 XSYNC Use-after-free in miSyncTriggerFence. CVE-2026-34001 XKB Out-of-bounds read in CheckModifierMap. CVE-2026-34002 XKB Buffer overflow in CheckKeyTypes. CVE-2026-34003...

RHEL 9 : tigervnc (RHSA-2026:20576)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:20576 advisory. Virtual Network Computing VNC is a remote display system which allows users to view a computing desktop environment not only on the machine...

ALSA-2026:19125 Important: xorg-x11-server-Xwayland security update

Xwayland is an X server for running X clients under Wayland. Security Fixes: xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling CVE-2026-33999 xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential...

Amazon Linux 2023 : xorg-x11-server-common, xorg-x11-server-devel, xorg-x11-server-source (ALAS2023-2026-1614)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1614 advisory. XKB Integer Underflow in XkbSetCompatMap CVE-2026-33999 XKB Out-of-bounds Read in CheckSetGeom CVE-2026-34000 XSYNC Use-after-free in miSyncTriggerFence CVE-2026-34001 XKB Out-of-bounds read i...

Important: xorg-x11-server-Xwayland

Issue Overview: XKB Integer Underflow in XkbSetCompatMap CVE-2026-33999 XKB Out-of-bounds Read in CheckSetGeom CVE-2026-34000 XSYNC Use-after-free in miSyncTriggerFence CVE-2026-34001 XKB Out-of-bounds read in CheckModifierMap CVE-2026-34002 XKB Buffer overflow in CheckKeyTypes CVE-2026-34003...

Important: tigervnc

Issue Overview: XKB Integer Underflow in XkbSetCompatMap CVE-2026-33999 XKB Out-of-bounds Read in CheckSetGeom CVE-2026-34000 XSYNC Use-after-free in miSyncTriggerFence CVE-2026-34001 XKB Out-of-bounds read in CheckModifierMap CVE-2026-34002 XKB Buffer overflow in CheckKeyTypes CVE-2026-34003...

openSUSE 15 Security Update : xwayland (SUSE-SU-2026:1329-1)

The remote openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1329-1 advisory. - CVE-2026-33999: XKB integer underflow in XkbSetCompatMap bsc1260922. - CVE-2026-34000: XKB out-of-bounds read in CheckSetGeom bsc1260923. -...

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...

SUSE-SU-2026:1333-1 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...

Security update for xwayland

This update for xwayland 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 out-of-bounds rea...

Security update for xwayland

This update for xwayland 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 out-of-bounds rea...

SUSE-SU-2026:1328-1 Security update for xwayland

This update for xwayland 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...