CVE-2018-14665

CVE-2018-14665 0x00 Introducción El investigador de seguridad indio Narendra Shinde descubrió en el paquete X.Org Server una vulnerabilidad crítica que permite a una cuenta de usuario normal escalar privilegios hasta root CVE-2018-14665, que afecta a las principales distribuciones de Linux,...

Astra Linux – Vulnerability in xwayland, xorg-server

A flaw was discovered in the X.Org X server. This vulnerability, an out-of-bounds read, affects the handling of XKB X Keyboard Extension modifier maps. An attacker with access to the X11 server can exploit this by sending a malformed request, causing the server to read beyond its intended memory...

Astra Linux – Vulnerability in xorg-server

A vulnerability was discovered in X.Org. This security flaw arises due to issues with the length validation of the handler for the XIChangeProperty request, leading to out-of-bounds memory reads and potential information disclosure. This issue can result in elevation of local privileges on system...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: xorg-x11-server (UTSA-2023-000012)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2023-000012 advisory. A vulnerability was found in X.Org. This security flaw occurs because the handler for the XIPassiveUngrab request accesses out-of-bounds memory when invoked with a...

Astra Linux – Vulnerability in xorg-server

A flaw was discovered in the X.Org server. Both DeviceFocusEvent and XIQueryPointer responses contain a bit for each logical button that is currently active. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server only allocates space for the specific number of buttons on...

Astra Linux – Vulnerability in xwayland, xorg-server

A flaw was discovered 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 vulnerability without any user interaction, resulting in a...

Astra Linux – Vulnerability in xwayland, xorg-server

A use-after-free flaw was identified in X.Org and Xwayland. When changing an alarm, the values of the change mask are evaluated one after the other, modifying the trigger values as required. Eventually, the SyncInitTrigger function is called. If one of these changes causes an error, the function...

Astra Linux – Vulnerability in xorg-server

A heap buffer overflow flaw was discovered in the DisableDevice function of the X.Org server. This issue may cause an application to crash, or in some cases, lead to remote code execution in SSH X11 forwarding environments...

Astra Linux – Vulnerability in xorg-server, xwayland

A heap-based buffer overflow vulnerability was discovered in the X.org server’s ProcXIGetSelectedEvents function. This issue occurs when length values that are swapped in bytes are used in replies. This can potentially lead to memory leakage and segmentation faults, especially when triggered by a...

GLSA-202608-14 : X.Org X server, XWayland: Multiple Vulnerabilities

The remote host is affected by the vulnerability described in GLSA-202608-14 X.Org X server, XWayland: Multiple Vulnerabilities Multiple vulnerabilities have been discovered in X.Org X server, XWayland. Please review the CVE identifiers referenced below for details. Tenable has extracted the...

Important: libXfont2 security update

X.Org X11 libXfont2 runtime library Security Fixes: libxfont2: Font Server Client encoding Out-Of-Bounds Read/Write CVE-2026-59679 libxfonts2: libXfont2: Privilege Escalation via Heap Buffer Overflow in Font Server Client CVE-2026-44950 For more details about the security issues, including the...

xorg: X11: xserver: X.org: glamor Font Atlas Heap Buffer Overflow

A flaw was found in the glamorfontget function of the xorg-x11-server. This vulnerability, a heap buffer overflow, occurs when the server processes a specially crafted PCF font file where individual glyph metrics exceed the declared maximum bounds. An authenticated X client can exploit this by...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free information disclosure in CreateSaverWindow()

A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow. A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free in miSyncDestroyFence()

A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence. A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free information disclosure in CreateSaverWindow()

A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow. A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: out-of-bounds read/write in GLX ChangeDrawableAttributes

An out-of-bounds read flaw was found in the X.Org X server and Xwayland in glXDispChangeDrawableAttributes. A wrong size validation check can read a client-controlled number of bytes, exceeding the request buffer, leading to information disclosure. A write path also exists but requires byte-swapp...

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...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free in SyncChangeCounter()

A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter. A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or f...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: out-of-bounds heap write in DRI2 DRIGetBuffers/DRIGetBuffersWithFormat

An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFormat. A client that requests multiple DRI2BufferBackLeft attachments and one DRI2BufferFrontLeft can trigger an out-of-bounds heap write. This may be used to crash the server, or for...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libXfont2 name length mismatch

A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. A mismatch between the X server and the libXfont2 library's maximum font name length can cause a stack buffer overflow during font alias resolution. The server allocates a 256 byte stack buffer but libXfont2's alias...