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

24.1.9-4.2 - Other security related fixes Resolves: https://redhat.atlassian.net/browse/RHEL-184292 24.1.9-4.1 - CVE fix for: CVE-2026-50256, CVE-2026-50257, CVE-2026-50258, CVE-2026-50259, CVE-2026-50260, CVE-2026-50261, CVE-2026-50262, CVE-2026-50263 Resolves:...

RHSA-2026:26566 Red Hat Security Advisory: xorg-x11-server-Xwayland security, bug fix, and enhancement update

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Important: Red Hat Security Advisory: xorg-x11-server-Xwayland security, bug fix, and enhancement update

An update for xorg-x11-server-Xwayland is now available for Red Hat Enterprise Linux 10. 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...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free in FreeCounter()

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

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free in miSyncDestroyFence()

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...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: out-of-bounds read/write in GLX ChangeDrawableAttributes

An out-of-bounds read flaw was found in the X.Org X server and Xwayland in glXDispChangeDrawableAttributes. A wrong size validation check can read a client-controlled number of bytes, exceeding the request buffer, leading to information disclosure. A write path also exists but requires byte-swapp...

Amazon Linux 2023 : tigervnc, tigervnc-icons, tigervnc-license (ALAS2023-2026-1892)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1892 advisory. A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. A mismatch between the X server and the libXfont2 library's maximum font name length can cause a stack buffer...

RHEL 10 : xorg-x11-server-Xwayland (RHSA-2026:26566)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:26566 advisory. Xwayland is an X server for running X clients under Wayland. Security Fixes: xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server:...

RHEL 9 : xorg-x11-server (RHSA-2026:26610)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:26610 advisory. X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical us...

RockyLinux 9 : xorg-x11-server (RLSA-2026:26610)

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:26610 advisory. xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libXfont2 name length mismatch...

RockyLinux 8 : xorg-x11-server (RLSA-2026:26709)

The remote RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:26709 advisory. xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libXfont2 name length mismatch...

Oracle Linux 8 : xorg-x11-server (ELSA-2026-26709)

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-26709 advisory. 1.20.11-28.2 - Other security related fixes Resolves: https://redhat.atlassian.net/browse/RHEL-184289 1.20.11-28.1 - CVE fix for: CVE-2026-50256,...

RockyLinux 8 : xorg-x11-server-Xwayland (RLSA-2026:26562)

The remote RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:26562 advisory. xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libXfont2 name length mismatch...

MiracleLinux 8 : xorg-x11-server-Xwayland-21.1.3-20.el8_10.2 (AXSA:2026-805:03)

The remote MiracleLinux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the AXSA:2026-805:03 advisory. xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libXfont2 name length mismatch...

Oracle Linux 8 : xorg-x11-server-Xwayland (ELSA-2026-26562)

The remote Oracle Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2026-26562 advisory. 21.1.3-20.2 - Other security related fixes Resolves: https://redhat.atlassian.net/browse/RHEL-184293 21.1.3-20.1 - CVE fix for: CVE-2026-50256,...

AlmaLinux 8 : xorg-x11-server (ALSA-2026:26709)

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:26709 advisory. xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libXfont2 name length mismatch...

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

An update is available for xorg-x11-server. 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 X.Org is an open-source implementation of the X Window System. It...

RLSA-2026:26590 Important: xorg-x11-server-Xwayland security, bug fix, and enhancement update

Xwayland is an X server for running X clients under Wayland. Security Fixes: xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libXfont2 name length mismatch CVE-2026-50256 xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-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 8. 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...

RLSA-2026:26562 Important: xorg-x11-server-Xwayland security, bug fix, and enhancement update

Xwayland is an X server for running X clients under Wayland. Security Fixes: xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libXfont2 name length mismatch CVE-2026-50256 xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server:...