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...

Important: Red Hat Security Advisory: tigervnc security update

An update for tigervnc is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red Hat Product Security has rated this update as having a security impact of Important. A Common...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in XKB SetMap request via mapWidths indexing

A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. XkbSetMapChecks declares a fixed-size stack buffer mapWidths256 indexed by key type index. The helper function CheckKeyTypes writes to this buffer at a client-controlled offset, allowing a stack buffer overflow. This...

Important: Red Hat Security Advisory: tigervnc security update

An update for tigervnc is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. 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...

RHEL 7 : tigervnc (RHSA-2026:46473)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:46473 advisory. Virtual Network Computing VNC is a remote display system which allows users to view a computing desktop environment not only on the machine...

MiracleLinux 9 : xorg-x11-server-Xwayland-24.1.9-4.el9_8.2 (AXSA:2026-1355:07)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1355:07 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 9 : xorg-x11-server-1.20.11-34.el9_8.2 (AXSA:2026-1354:12)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1354:12 advisory. xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libXfont2 name length mismatch...

RHEL 8 : tigervnc (RHSA-2026:46385)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:46385 advisory. Virtual Network Computing VNC is a remote display system which allows users to view a computing desktop environment not only on the machine...

Security update for ImageMagick

This update for ImageMagick fixes the following issues: CVE-2026-55628: policy bypass in concatenate operation due to missing checks bsc1270081. CVE-2026-56362: heap buffer overflow read in GetPixelIndex due to metadata-cache desynchronization in OpenPixelCache bsc1271100. CVE-2026-56366: META...

SUSE-SU-2026:3219-1 Security update for ImageMagick

This update for ImageMagick fixes the following issues: - CVE-2026-55628: policy bypass in concatenate operation due to missing checks bsc1270081. - CVE-2026-56362: heap buffer overflow read in GetPixelIndex due to metadata-cache desynchronization in OpenPixelCache bsc1271100. - CVE-2026-56366:...

Security update for ImageMagick

This update for ImageMagick fixes the following issues CVE-2026-56375: possible memory leak in ASHLAR coder when action fails bsc1271495. CVE-2026-61464: heap buffer overwrite in X11 import with crafted window title bsc1271496. CVE-2026-61859: policy bypass in script operation due to missing chec...

Amazon Linux 2 : xorg-x11-server, --advisory ALAS2-2026-3806 (ALAS-2026-3806)

It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3806 advisory. glamor Font Atlas Heap Buffer Overflow CVE-2026-55999 Tenable has extracted the preceding description block directly from the tested product security advisory. Note that Nessus has not tested for this iss...

Amazon Linux 2023 : xorg-x11-server-Xwayland, xorg-x11-server-Xwayland-devel (ALAS2023-2026-1944)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1944 advisory. glamor Font Atlas Heap Buffer Overflow CVE-2026-55999 GLX contextTags Use-After-Free in CommonMakeCurrent CVE-2026-56000 Tenable has extracted the preceding description block directly from the...

Important: xorg-x11-server

Issue Overview: glamor Font Atlas Heap Buffer Overflow CVE-2026-55999 Affected Packages: xorg-x11-server Issue Correction: Run dnf update xorg-x11-server --releasever 2023.12.20260720 or dnf update --advisory ALAS2023-2026-1943 --releasever 2023.12.20260720 to update your system. More information...

Important: xorg-x11-server-Xwayland

Issue Overview: glamor Font Atlas Heap Buffer Overflow CVE-2026-55999 GLX contextTags Use-After-Free in CommonMakeCurrent CVE-2026-56000 Affected Packages: xorg-x11-server-Xwayland Issue Correction: Run dnf update xorg-x11-server-Xwayland --releasever 2023.12.20260720 or dnf update --advisory...

Amazon Linux 2023 : xorg-x11-server-common, xorg-x11-server-devel, xorg-x11-server-source (ALAS2023-2026-1943)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1943 advisory. glamor Font Atlas Heap Buffer Overflow CVE-2026-55999 Tenable has extracted the preceding description block directly from the tested product security advisory. Note that Nessus has not tested for this...

[SECURITY] Fedora 44 Update: openssh-10.2p1-13.fc44

SSH Secure SHell is a program for logging into and executing commands on a remote machine. SSH is intended to replace rlogin and rsh, and to provide secure encrypted communications between two untrusted hosts over an insecure network. X11 connections and arbitrary TCP/IP ports can also be forward...

Oracle Linux 10 : xorg-x11-server-Xwayland (ELSA-2026-26566)

The remote Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-26566 advisory. - 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 Resolve...

CVE-2026-61464

ImageMagick before 7.1.2-26 and 6.9.13-51 contains a heap-based buffer over-write vulnerability that occurs when running an X11 import with a crafted window title, which can result in heap memory corruption and denial of service. Mitigation Do not use ImageMagick's X11 import command with untrust...

MiracleLinux 8 : xorg-x11-server-1.20.11-28.el8_10.3 (AXSA:2026-1275:10)

The remote MiracleLinux 8 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2026-1275:10 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...