Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb setmap request via mapwidths indexing

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Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in freecounter()

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Fedora 43 : xorg-x11-server (2026-c3ea7d7b0e)

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-c3ea7d7b0e advisory. Update to xserver 21.1.23, Security fixes for: ZDI-CAN-30136, ZDI-CAN-30159, ZDI-CAN-30160, ZDI-CAN-30161, ZDI-CAN-30163, ZDI-CAN-30164, ZDI-CAN-30165,...

TencentOS Server 4: xorg-x11-server (TSSA-2026:0294)

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0294 advisory. Package updates are available for TencentOS Server 4 that fix the following vulnerabilities...

CVE-2026-50263

CVE-2026-50263 affects the X.Org X server and Xwayland. The flaw is a use-after-free in CreateSaverWindow() that can cause a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure. Impact is confidentiality (information disclosure) wit...

CVE-2026-50261

The CVE-2026-50261 entry describes a use-after-free in the X.Org X server and Xwayland related to SyncChangeCounter(). A client that creates multiple SyncCounters can trigger a use-after-free when those counters are destroyed via a second client connection during a change, potentially crashing th...

CVE-2026-50258

The CVE affects the X.Org X server and Xwayland. A stack-based buffer overflow arises from unchecked key-type shift levels in XkbKeyTypes: multiple stack buffers sized XkbMaxShiftLevel * XkbNumKbdGroups are not clamped by CheckKeyTypes(), allowing a client to set excessive shift levels and trigge...

Security update for xorg-x11-server (important)

openSUSE security update: security update for xorg-x11-server ------------------------------------------------------------- Announcement ID: openSUSE-SU-2026:20896-1 Rating: important References: bsc1266294 bsc1266295 bsc1266296 bsc1266297 bsc1266298 bsc1266299 bsc1266300 bsc1266301 bsc1266302...

Fedora 44 : xorg-x11-server (2026-7e38f57cef)

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-7e38f57cef advisory. Update to xserver 21.1.23, security fixes for: ZDI-CAN-30136, ZDI-CAN-30159, ZDI-CAN-30160, ZDI-CAN-30161, ZDI-CAN-30163, ZDI-CAN-30164, ZDI-CAN-30165,...

Security update for xorg-x11-server

This update for xorg-x11-server fixes the following issues CreateSaverWindow Use-After-Free Information Disclosure. bsc1266301 DRI2 DRIGetBuffers/DRIGetBuffersWithFormat Out-Of-Bounds Write. bsc1266302 Font Alias Stack-based Buffer Overflow. bsc1266294 GLX ChangeDrawableAttributes Out-Of-Bounds...

SUSE-SU-2026:2224-1 Security update for xorg-x11-server

This update for xorg-x11-server fixes the following issues - CreateSaverWindow Use-After-Free Information Disclosure. bsc1266301 - DRI2 DRIGetBuffers/DRIGetBuffersWithFormat Out-Of-Bounds Write. bsc1266302 - Font Alias Stack-based Buffer Overflow. bsc1266294 - GLX ChangeDrawableAttributes...

Security update for xorg-x11-server

This update for xorg-x11-server fixes the following issues CreateSaverWindow Use-After-Free Information Disclosure. bsc1266301 DRI2 DRIGetBuffers/DRIGetBuffersWithFormat Out-Of-Bounds Write. bsc1266302 Font Alias Stack-based Buffer Overflow. bsc1266294 GLX ChangeDrawableAttributes Out-Of-Bounds...

SUSE-SU-2026:2221-1 Security update for xorg-x11-server

This update for xorg-x11-server fixes the following issues - CreateSaverWindow Use-After-Free Information Disclosure. bsc1266301 - DRI2 DRIGetBuffers/DRIGetBuffersWithFormat Out-Of-Bounds Write. bsc1266302 - Font Alias Stack-based Buffer Overflow. bsc1266294 - GLX ChangeDrawableAttributes...

RHSA-2026:21742 Red Hat Security Advisory: xorg-x11-server security update

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RHSA-2026:21715 Red Hat Security Advisory: xorg-x11-server security update

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xorg-x11-server security 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...

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

An update for xorg-x11-server is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability...

RHSA-2026:21699 Red Hat Security Advisory: xorg-x11-server security update

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

An update for xorg-x11-server 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...

RHSA-2026:20590 Red Hat Security Advisory: xorg-x11-server security update

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