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. 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...

xorg-x11-server: xwayland: xorg-x11-server: Arbitrary code execution via double-free in XKB geometry handling

A flaw was found in the X.Org X Server and XWayland. An error handling issue in the X Keyboard Extension XKB geometry processing fails to clear a memory pointer after an allocation failure, leading to a double-free condition during cleanup. A local user can exploit this vulnerability by sending a...

xorg-x11-server: xorg-x11-server: Arbitrary code execution via use-after-free in passive grab handling

A flaw was found in xorg-x11-server. A local user can exploit a use-after-free condition—where the software attempts to access memory after it has been freed—by establishing a passive input grab and removing an input device. When subsequent input events are processed, the server dereferences the...

xorg-x11-server: xorg-x11-server: arbitrary code execution via GLX RenderLarge heap-based buffer overflow

A flaw was found in xorg-x11-server. The GLX OpenGL Extension to the X Window System interface fails to verify that incoming data sizes do not exceed allocated buffer limits when handling large rendering requests. An authenticated local client can exploit this vulnerability by sending a specially...

xorg-x11-server: xorg-x11-server: arbitrary code execution via integer truncation during keyboard mapping resize

A flaw was found in xorg-x11-server. Due to an integer truncation issue during memory allocation calculations within the X Keyboard Extension XKB, the server allocates an undersized buffer when resizing key types. An authenticated local client can exploit this vulnerability by sending specially...

xorg-x11-server: xorg-x11-server: Arbitrary code execution via buffer overflow in input_constrain_cursor()

A flaw was found in xorg-x11-server. The server writes pointer barrier events into a fixed-size buffer without properly validating boundaries. An authenticated client can trigger this issue by configuring excessive pointer barriers and generating cursor motion events, causing a buffer overflow...

xorg-x11-server: xorg-x11-server: arbitrary code execution via out-of-bounds write in XKB keycode handling

A flaw was found in xorg-x11-server. In the X Keyboard Extension XKB, key name memory is allocated with an insufficient buffer size compared to the maximum supported range. An authenticated local client can exploit this flaw by sending requests that modify the keycode range, triggering a heap-bas...

xorg-x11-server: xorg-x11-server: Privilege escalation via crafted RandR provider property requests

A flaw was found in xorg-x11-server. The X server incorrectly calculates buffer sizes and memory offsets when prepending or appending data to RandR Resize and Rotate extension provider properties. A local attacker can exploit this vulnerability by sending specially crafted property update request...

xorg-x11-server: xorg-x11-server: Out-of-bounds write via unvalidated modifier in ProcXIPassiveUngrabDevice

A flaw was found in xorg-x11-server. A local authenticated client can exploit this flaw by sending a crafted input device ungrab request with an unvalidated modifier value. This lack of validation causes the server to perform an out-of-bounds write on the heap, resulting in memory corruption that...

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...

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-server: xorg-x11-server: Arbitrary code execution via use-after-free in passive grab handling...

ALSA-2026:89747 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-server: xorg-x11-server: Arbitrary code execution via use-after-free in passive grab handling...

CVE-2026-116160

ImageMagick before 6.9.13-58 and 7.x before 7.1.2-33 contains a heap-based buffer overflow in the X11 animate operation when processing crafted images. Attackers can supply a malicious image that, when a user runs an X11 animate operation on it, overwrites heap memory and can crash the applicatio...

CVE-2026-116160

A flaw was found in ImageMagick. An attacker can cause a Denial of Service DoS by tricking a user into processing a specially crafted image file using the X11 animate feature. Processing the image triggers a heap-based buffer overflow, writing data beyond allocated memory limits, which corrupts...

EUVD-2026-109421

ImageMagick before 6.9.13-58 and 7.x before 7.1.2-33 contains a heap-based buffer overflow in the X11 animate operation when processing crafted images. Attackers can supply a malicious image that, when a user runs an X11 animate operation on it, overwrites heap memory and can crash the applicatio...

CVE-2026-116160

The software ImageMagick versions before 6.9.13-58 and 7.x before 7.1.2-33 is vulnerable to a heap-based buffer overflow within the X11 animate operation. This flaw occurs when the application processes crafted images provided by an attacker. If a user performs an X11 animate operation on such a ...

CVE-2026-116160 ImageMagick before 6.9.13-58 and 7.x before 7.1.2-33 Heap Buffer Overflow via X11 Animate

ImageMagick before 6.9.13-58 and 7.x before 7.1.2-33 contains a heap-based buffer overflow in the X11 animate operation when processing crafted images. Attackers can supply a malicious image that, when a user runs an X11 animate operation on it, overwrites heap memory and can crash the applicatio...

Amazon Linux 2023 : xorg-x11-server-Xwayland, xorg-x11-server-Xwayland-devel (ALAS2023-2026-3261)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3261 advisory. CheckSetDoodad in xkb/xkb.c frees doodad-text.text on error but doesnot NULL the pointer. When the error path continues, XkbClearDoodad iscalled during cleanup and frees the same pointer again...

Amazon Linux 2023 : xorg-x11-server-common, xorg-x11-server-devel, xorg-x11-server-source (ALAS2023-2026-3260)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3260 advisory. CheckSetDoodad in xkb/xkb.c frees doodad-text.text on error but doesnot NULL the pointer. When the error path continues, XkbClearDoodad iscalled during cleanup and frees the same pointer again...

PT-2026-123001

ImageMagick before 6.9.13-58 and 7.x before 7.1.2-33 contains a heap-based buffer overflow in the X11 animate operation when processing crafted images. Attackers can supply a malicious image that, when a user runs an X11 animate operation on it, overwrites heap memory and can crash the applicatio...