xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access

A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash,...

xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling

A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of servi...

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: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling...

xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access

A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash,...

Important: tigervnc security update

Virtual Network Computing VNC is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients...

[SECURITY] Fedora 43 Update: xorg-x11-server-21.1.22-1.fc43

X.Org X11 X server...

CVE-2026-33999

A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of servi...

CVE-2026-34003 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory access

A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash,...

CVE-2026-34003

A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash,...

CVE-2026-34001

A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially...

X.Org X Server 缓冲区错误漏洞

The X.Org X Server is an X Window system display server developed by the X.Org Foundation. The X.Org X Server has a buffer error vulnerability, which stems from an out-of-bounds memory access during the validation of XKB key type requests. This vulnerability could allow local attackers to send...

X.Org X Server 安全漏洞

X.Org X Server is an X Window system display server developed by the X.Org Foundation. There are security vulnerabilities in X.Org X Server, which stem from the reutilization of freed resources in the XSYNC fence trigger logic. Attackers could exploit these vulnerabilities to cause server crashes...

X.Org libXpm 安全漏洞

X.Org libXpm is a graphics processing library developed by the X.Org Foundation. X.Org libXpm has a security vulnerability that stems from the xpmNextWord function’s ability to read memory segments, which may lead to the extraction of sensitive information...

PT-2026-46938

Name of the Vulnerable Software and Affected Versions X.Org X server affected versions not specified Xwayland affected versions not specified Description A stack-based buffer overflow exists in the X.Org X server and Xwayland. The issue occurs because the CheckKeyTypes function fails to verify or...

PT-2026-46937

Name of the Vulnerable Software and Affected Versions X.Org X server affected versions not specified Xwayland affected versions not specified Description A use-after-free flaw exists in the miSyncDestroyFence function. This occurs when a client sets up multiple fence triggers, allowing a function...

PT-2026-46943

Name of the Vulnerable Software and Affected Versions X.Org X server affected versions not specified Xwayland affected versions not specified Description A use-after-free flaw exists in the CreateSaverWindow function. A client can trigger a use-after-free read by changing window attributes and...

OESA-2026-1591 libX11 security update

Core X11 protocol client library. Security Fixes: A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: xorg-x11-server (UTSA-2026-006172)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-006172 advisory. A flaw was found in the RandR extension, where the RRChangeProviderProperty function does not properly validate input. This issue leads to an integer overflow when...

Unity Linux 20.1070e Security Update: xorg-x11-server (UTSA-2026-005920)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005920 advisory. A flaw was found in X.Org Server before xorg-x11-server 1.20.9. An Integer underflow leading to heap- buffer overflow may lead to a privilege escalation vulnerabilit...

MiracleLinux 7 : tigervnc-1.8.0-25.el7, xorg-x11-server-1.20.4-23.el7 (AXSA:2023-5250:02)

The remote MiracleLinux 7 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2023-5250:02 advisory. xorg-x11-server: X.Org Server Overlay Window Use-After-Free Local Privilege Escalation Vulnerability CVE-2023-1393 Tenable has extracted the preceding...