xorg: xwayland: X.Org X server: Information disclosure or Denial of Service via out-of-bounds read in XKB modifier map handling

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 handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory...

xorg: xwayland: X.Org X server: Information disclosure or Denial of Service via out-of-bounds read in XKB modifier map handling

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 handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory...

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,...

TencentOS Server 3: tigervnc (TSSA-2025:1016)

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2025:1016 advisory. Package updates are available for TencentOS Server 3 that fix the following vulnerabilities...

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...

EUVD-2026-27343

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 handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory...

CVE-2026-34000

A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the CheckSetGeom and XkbAddGeomKeyAlias functions, allows an attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server,...

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...

SUSE SLED15 / SLES15 Security Update : xorg-x11-server (SUSE-SU-2026:1330-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1330-1 advisory. - CVE-2026-33999: XKB Integer Underflow in XkbSetCompatMap bsc1260922. - CVE-2026-34000: XKB Out-of-bounds Rea...

SUSE SLES15: xorg-x11-server / xorg-x11-server-Xvfb / xorg-x11-server-extra / etc (SUSE-SU-2026:1331-1)

The remote SUSE Linux SLES15 / SLESSAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1331-1 advisory. - CVE-2026-33999: XKB integer underflow in XkbSetCompatMap bsc1260922. - CVE-2026-34000: XKB out-of-bounds read in...

Security update for xorg-x11-server

This update for xorg-x11-server fixes the following issues: CVE-2026-33999: XKB integer underflow in XkbSetCompatMap bsc1260922. CVE-2026-34000: XKB out-of-bounds read in CheckSetGeom bsc1260923. CVE-2026-34001: XSYNC use-after-free in miSyncTriggerFence bsc1260924. CVE-2026-34002: XKB...

CVE-2026-34002

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 handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory...

UBUNTU-CVE-2026-34000

A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the CheckSetGeom and XkbAddGeomKeyAlias functions, allows an attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server,...

UBUNTU-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,...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: xorg-x11-server (UTSA-2026-006165)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-006165 advisory. A flaw was discovered in the X.Org X servers X Keyboard Xkb extension when handling client resource cleanup. The software frees certain data structures without...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: xorg-x11-server (UTSA-2026-006141)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-006141 advisory. A flaw was identified in the X.Org X servers X Keyboard Xkb extension where improper bounds checking in the XkbSetCompatMap function can cause an unsigned short...

Astra Linux – Vulnerability in xorg-server

A flaw was discovered in the X.Org X server’s X Keyboard Xkb extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, resulting in a use-after-free condition. This can cause memory corruption or a crash when affected...

AIX : Multiple Vulnerabilities (IJ57162)

The version of AIX installed on the remote host is prior to APAR IJ57162. It is, therefore, affected by multiple vulnerabilities as referenced in the IJ57162 advisory. - A flaw was identified in the X.Org X server's X Keyboard Xkb extension where improper bounds checking in the XkbSetCompatMap...

xorg: xmayland: Value overflow in XkbSetCompatMap()

A flaw was identified in the X.Org X server’s X Keyboard Xkb extension where improper bounds checking in the XkbSetCompatMap function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overflow, leading to memory corruption or a cras...

xorg: xwayland: Use-after-free in Xkb client resource removal

A flaw was discovered in the X.Org X server’s X Keyboard Xkb extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, leading to a use-after-free condition. This can cause memory corruption or a crash when affected...