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...

RLSA-2026:10739 Important: tigervnc security update

Virtual Network Computing VNC is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients...

tigervnc security update

An update is available for tigervnc. 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 Virtual Network Computing VNC is a remote display system which allows users ...

xorg-x11-server-Xwayland security update

24.1.5-6 - CVE fix for: CVE-2026-33999, CVE-2026-34000, CVE-2026-34001 CVE-2026-34002, CVE-2026-34003 Resolves: https://redhat.atlassian.net/browse/RHEL-163188 Resolves: https://redhat.atlassian.net/browse/RHEL-163284 Resolves: https://redhat.atlassian.net/browse/RHEL-163242...

ALSA-2026:11388 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-x11-server-Xwayland security update

23.2.7-6 - CVE fix for: CVE-2026-33999, CVE-2026-34000, CVE-2026-34001 CVE-2026-34002, CVE-2026-34003 Resolves: https://redhat.atlassian.net/browse/RHEL-163198 Resolves: https://redhat.atlassian.net/browse/RHEL-163294 Resolves: https://redhat.atlassian.net/browse/RHEL-163252...

xorg-x11-server security update

1.20.11-33 - CVE fix for: CVE-2026-33999, CVE-2026-34000, CVE-2026-34001 CVE-2026-34002, CVE-2026-34003 Resolves: https://redhat.atlassian.net/browse/RHEL-163225 Resolves: https://redhat.atlassian.net/browse/RHEL-163307 Resolves: https://redhat.atlassian.net/browse/RHEL-163238...

RockyLinux 9 : tigervnc (RLSA-2026:10739)

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:10739 advisory. 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:...

ALSA-2026:11352 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...

Important: Red Hat Security Advisory: tigervnc security update

An update for tigervnc is now available for Red Hat Enterprise Linux 9. 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 available for each vulnerability from...

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...

RHEL 9 : tigervnc (RHSA-2026:10739)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:10739 advisory. Virtual Network Computing VNC is a remote display system which allows users to view a computing desktop environment not only on the machine...

Oracle Linux 9 : tigervnc (ELSA-2026-10739)

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-10739 advisory. - Fix CVE-2026-33999, CVE-2026-34000, CVE-2026-34001, CVE-2026-34002, CVE-2026-34003 xorg-x11-server: various XKB and XSYNC vulnerabilities Resolves:...

Fedora 44 : xorg-x11-server (2026-cf9e55a7a0)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-cf9e55a7a0 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...

[SECURITY] Fedora 42 Update: xorg-x11-server-21.1.22-1.fc42

X.Org X11 X server...

Fedora 43 : xorg-x11-server (2026-a7ec361237)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-a7ec361237 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...

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 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory access

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,...