Affected: Alpaquita:stream: xorg-server

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 boundaries. This can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of service.

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 boundaries. This can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of service.

Affected: openEuler:24.03-LTS: xorg-x11-server, openEuler:24.03-LTS-SP1: xorg-x11-server, openEuler:24.03-LTS-SP3: xorg-x11-server, openEuler:20.03-LTS-SP4: xorg-x11-server, openEuler:22.03-LTS-SP4: xorg-x11-server

X.Org X11 X server Security Fix(es):

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 service (DoS) or other severe impacts.(CVE-2026-33999)

(CVE-2026-34000)

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 enabling memory corruption. This could result in a denial of service or further compromise of the system.(CVE-2026-34001)

(CVE-2026-34002)

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, leading to a Denial of Service (DoS). In certain configurations, higher impact outcomes may be possible.(CVE-2026-34003)

xorg-x11-server-21.1.21-5.1 on GA media

xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling xwayland: xorg: X.Org X server: Information disclosure and denial of service via out-of-bounds read in XKB geometry processing. xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption xorg: xwayland: X.Org X server: Information disclosure or Denial of Service via out-of-bounds read in XKB modifier map handling xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access

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:Pro: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 4 more

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 boundaries. This can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of service.

Ein lokaler Angreifer kann mehrere Schwachstellen in X.Org X11 und Xwayland ausnutzen, um nicht näher spezifizierte Angriffe durchzuführen, darunter möglicherweise Speicherbeschädigungen, die Offenlegung von Informationen oder einen Denial-of-Service-Zustand.