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: 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 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: 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 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 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: 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: 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...

CVE-2026-88812

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...

CVE-2026-93524

A flaw was found in xorg-x11-server. An authenticated local user can trigger an out-of-bounds heap memory read by sending specially crafted X Keyboard Extension XKB requests with inconsistent key range parameters. This flaw leads to information disclosure, allowing the user to read sensitive data...

CVE-2026-93520

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...

CVE-2026-93518

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...

EulerOS 2.0 SP15 : xorg-x11-server (EulerOS-SA-2026-2915)

According to the versions of the xorg-x11-server packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB X Keyboard Extension modifier map...

EulerOS 2.0 SP15 : xorg-x11-server (EulerOS-SA-2026-2956)

According to the versions of the xorg-x11-server packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB X Keyboard Extension modifier map...

EulerOS 2.0 SP10 : xorg-x11-server (EulerOS-SA-2026-2678)

According to the versions of the xorg-x11-server packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB X Keyboard Extension modifier map...

EulerOS 2.0 SP10 : xorg-x11-server (EulerOS-SA-2026-2719)

According to the versions of the xorg-x11-server packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB X Keyboard Extension modifier map...

EulerOS 2.0 SP12 : xorg-x11-server (EulerOS-SA-2026-2637)

According to the versions of the xorg-x11-server packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in XKB key types due to unchecked shift levels

A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. The X server has multiple stack buffers sized XkbMaxShiftLevel XkbNumKbdGroups but CheckKeyTypes does not verify or clamp non-canonical key types to XkbMaxShiftLevel. A client can change key types to excessive shift...

tigervnc security update

1.15.0-7.1 - Fix CVE-2026-33999, CVE-2026-34000, CVE-2026-34001, CVE-2026-34002, CVE-2026-34003 xorg-x11-server: various XKB and XSYNC vulnerabilities Resolves: RHEL-163213 Resolves: RHEL-163281 Resolves: RHEL-163267 - Fix CVE-2026-34352 Resolves: RHEL-167986 1.15.0-7 - Fix CVE-2025-62229:...

PT-2026-53651

This update for xwayland fixes the following issues: - CreateSaverWindow Use-After-Free Information Disclosure. bsc1266301 - Font Alias Stack-based Buffer Overflow. bsc1266294 - GLX ChangeDrawableAttributes Out-Of-Bounds Read/Write. bsc1266300 - XKB Key Types Stack-based Buffer Overflow. bsc12662...