Important: Red Hat Security Advisory: tigervnc security update

An update for tigervnc is now available for Red Hat Enterprise Linux 8. 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-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free in SyncChangeCounter()

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

UBUNTU-CVE-2026-55655

A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by pre-binding the preferred abstract X socket name when X11 forwarding is enabled and a local UNIX-domain X socket is used. A successful attack ca...

CVE-2026-55655 Openssh: local mitm of x11 forwarding via abstract unix socket pre-binding in red hat enterprise linux openssh client versions

A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by pre-binding the preferred abstract X socket name when X11 forwarding is enabled and a local UNIX-domain X socket is used. A successful attack ca...

Linux Distros Unpatched Vulnerability : CVE-2026-55655

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 OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by...

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...

Astra Linux – Vulnerability in Qt4-X11

An integer overflow vulnerability exists in qsvghandler.cpp in Qt qtsvg versions 5.15.1, 6.0.0, 6.0.2, and 6.2, allowing local attackers to cause a denial of service DoS attack...

RHSA-2026:26709 Red Hat Security Advisory: xorg-x11-server security, bug fix, and enhancement update

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RHSA-2026:26590 Red Hat Security Advisory: xorg-x11-server-Xwayland security, bug fix, and enhancement update

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RHSA-2026:26562 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 security, bug fix, and enhancement update

An update for xorg-x11-server is now available for Red Hat Enterprise Linux 8. 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 vulnerabilit...

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

An update for xorg-x11-server 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 vulnerabilit...

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 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...

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...

CVE-2026-50263 affecting package xorg-x11-server-Xwayland for versions less than 24.1.12-1

CVE-2026-50263 affecting package xorg-x11-server-Xwayland for versions less than 24.1.12-1. An upgraded version of the package is available that resolves this issue...

CVE-2026-50256 affecting package xorg-x11-server-Xwayland for versions less than 24.1.12-1

CVE-2026-50256 affecting package xorg-x11-server-Xwayland for versions less than 24.1.12-1. An upgraded version of the package is available that resolves this issue...

CVE-2026-50262 affecting package xorg-x11-server-Xwayland for versions less than 24.1.12-1

CVE-2026-50262 affecting package xorg-x11-server-Xwayland for versions less than 24.1.12-1. An upgraded version of the package is available that resolves this issue...

CVE-2026-50257 affecting package xorg-x11-server-Xwayland for versions less than 24.1.12-1

CVE-2026-50257 affecting package xorg-x11-server-Xwayland for versions less than 24.1.12-1. An upgraded version of the package is available that resolves this issue...

CVE-2026-50258 affecting package xorg-x11-server-Xwayland for versions less than 24.1.12-1

CVE-2026-50258 affecting package xorg-x11-server-Xwayland for versions less than 24.1.12-1. An upgraded version of the package is available that resolves this issue...