Affected: AlmaLinux:9: tigervnc, AlmaLinux:9: tigervnc-icons, AlmaLinux:9: tigervnc-license, AlmaLinux:9: tigervnc-selinux, AlmaLinux:9: tigervnc-server, AlmaLinux:9: tigervnc-server-minimal, AlmaLinux:9: tigervnc-server-module

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 Fix(es):

* X.Org: Xwayland: Use-after-free of the root cursor (CVE-2025-26594) * xorg: xwayland: Use-after-free in SyncInitTrigger() (CVE-2025-26601) * xorg: xwayland: Use-after-free in PlayReleasedEvents() (CVE-2025-26600) * xorg: xwayland: Use of uninitialized pointer in compRedirectWindow() (CVE-2025-26599) * xorg: xwayland: Out-of-bounds write in CreatePointerBarrierClient() (CVE-2025-26598) * xorg: xwayland: Buffer overflow in XkbChangeTypesOfKey() (CVE-2025-26597) * xorg: xwayland: Heap overflow in XkbWriteKeySyms() (CVE-2025-26596) * Xorg: xwayland: Buffer overflow in XkbVModMaskText() (CVE-2025-26595)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected: Alpaquita:23: xorg-server, Alpaquita:stream: xorg-server

A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to check the bounds of the buffer and would copy the data regardless of the size.

A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to check the bounds of the buffer and would copy the data regardless of the size.

Affected: openEuler:22.03-LTS-SP3: libxkbfile, openEuler:22.03-LTS-SP4: libxkbfile, openEuler:24.03-LTS: libxkbfile, openEuler:24.03-LTS-SP1: libxkbfile, openEuler:20.03-LTS-SP4: libxkbfile

Libxkbfile is used by the X servers and utilities to parse the XKB configuration data files. Security Fix(es):

A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to check the bounds of the buffer and would copy the data regardless of the size.(CVE-2025-26595)

libxkbfile-devel-1.1.3-2.1 on GA media

X.Org: Xwayland: Use-after-free of the root cursor Xorg: xwayland: Buffer overflow in XkbVModMaskText() xorg: xwayland: Heap overflow in XkbWriteKeySyms() xorg: xwayland: Buffer overflow in XkbChangeTypesOfKey() xorg: xwayland: Out-of-bounds write in CreatePointerBarrierClient() xorg: xwayland: Use of uninitialized pointer in compRedirectWindow() xorg: xwayland: Use-after-free in PlayReleasedEvents() xorg: xwayland: Use-after-free in SyncInitTrigger()

Security update for xwayland

Affected: Ubuntu:Pro:14.04:LTS: xorg-server, Ubuntu:Pro:16.04:LTS: xorg-server, Ubuntu:Pro:16.04:LTS: xorg-server-hwe-16.04, Ubuntu:Pro:18.04:LTS: xorg-server, Ubuntu:Pro:18.04:LTS: xorg-server-hwe-18.04, Ubuntu:20.04:LTS: xorg-server, Ubuntu:22.04:LTS: xorg-server, Ubuntu:22.04:LTS: xwayland, Ubuntu:24.04:LTS: xorg-server, Ubuntu:24.04:LTS: xwayland and 1 more

A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to check the bounds of the buffer and would copy the data regardless of the size.

Ein lokaler Angreifer kann mehrere Schwachstellen in X.Org X11 ausnutzen, um nicht spezifizierte Effekte zu verursachen, was möglicherweise zur Ausführung von beliebigem Code führt.