ALSA-2026:38487 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: X11: xserver: X.org: glamor Font Atlas Heap Buffer Overflow CVE-2026-55999 For more details about the...

AlmaLinux 8 : xorg-x11-server (ALSA-2026:38487)

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:38487 advisory. xorg: X11: xserver: X.org: glamor Font Atlas Heap Buffer Overflow CVE-2026-55999 Tenable has extracted the preceding description block directly from the AlmaLinux...

openSUSE 16: xorg-x11-server / xorg-x11-server-Xvfb / xorg-x11-server-extra / etc (openSUSE-SU-2026:21273-1)

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21273-1 advisory. This update for xorg-x11-server fixes the following issues - CVE-2026-55999: missing bounds check in glamorfontget can lead to a heap buffer...

CVE-2026-56000 affecting package xorg-x11-server-Xwayland for versions less than 24.1.13-1

CVE-2026-56000 affecting package xorg-x11-server-Xwayland for versions less than 24.1.13-1. An upgraded version of the package is available that resolves this issue...

Oracle Linux 7 : tigervnc (ELSA-2026-22456)

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-22456 advisory. - Fix CVE-2026-33999, CVE-2026-34000, CVE-2026-34001, CVE-2026-34002, CVE-2026-34003 and CVE-2026-34352 Orabug: 39478221 - Fix CVE-2025-62229:...

EulerOS 2.0 SP12 : xorg-x11-server (EulerOS-SA-2026-2577)

According to the versions of the xorg-x11-server packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the...

RHSA-2026:36792 Red Hat Security Advisory: xorg-x11-server security update

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RHSA-2026:36791 Red Hat Security Advisory: xorg-x11-server security update

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RHSA-2026:36768 Red Hat Security Advisory: xorg-x11-server security update

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xorg-x11-server / xwayland GLX contextTags Use-After-Free in CommonMakeCurrent()

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SUSE SLES15 Security Update : xorg-x11-server (SUSE-SU-2026:2789-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2789-1 advisory. This update for xorg-x11-server fixes the following issues - CVE-2026-55999: glamor Font Atlas Heap Buffer Overflow bsc1268893. -...

RHEL 8 : xorg-x11-server (RHSA-2026:36768)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:36768 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...

tigervnc security update

1.8.0-33.0.11 - Fix CVE-2026-33999, CVE-2026-34000, CVE-2026-34001, CVE-2026-34002, CVE-2026-34003 and CVE-2026-34352 Orabug: 39478221 1.8.0-33.0.9 - Fix CVE-2025-62229: xorg-x11-server: Use-after-free in XPresentNotify structures creation Orabug: 38694278 - Fix CVE-2025-62230: xorg-x11-server:...

SUSE SLES12 Security Update : xorg-x11-server (SUSE-SU-2026:2792-1)

The remote SUSE Linux SLES12 host has packages installed that are affected by a vulnerability as referenced in the SUSE- SU-2026:2792-1 advisory. This update for xorg-x11-server fixes the following issue - CVE-2026-55999: missing bounds check in glamorfontget can lead to a heap buffer overflow wh...

SUSE SLES15: xorg-x11-server / xorg-x11-server-Xvfb / xorg-x11-server-extra / etc (SUSE-SU-2026:2786-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2786-1 advisory. This update for xorg-x11-server fixes the following issues - CVE-2026-55999: missing bounds check in glamorfontget can lead to a he...

RHEL 8 : xorg-x11-server (RHSA-2026:36791)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:36791 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...

Oracle Linux 7 : xorg-x11-server (ELSA-2026-20590)

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-20590 advisory. - Security update for CVE-2026-33999 CVE-2026-34000 CVE-2026-34001 CVE-2026-34002 CVE-2026-34003 Orabug: 39440282 - Security update for CVE-2025-62229...

RHEL 8 : xorg-x11-server (RHSA-2026:36792)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:36792 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...

CVE-2026-56000

A flaw was found in the X.org X11 server, specifically within the GLX OpenGL Extension to the X Window System dispatch layer. A remote attacker can exploit this vulnerability by sending a series of crafted X11 requests. This can lead to a use-after-free condition, where the server attempts to wri...

Important: Red Hat Security Advisory: xorg-x11-server-Xwayland security update

An update for xorg-x11-server-Xwayland is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. 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...