CVE-2025-26600

A use-after-free flaw was found in X.Org and Xwayland. When a device is removed while still frozen, the events queued for that device remain while the device is freed. Replaying the events will cause a use-after-free. Mitigation Mitigation for this issue is either not available or the currently...

CVE-2025-26599

CVE-2025-26599 (X.Org / Xwayland) : An access to an uninitialized pointer flaw exists in compRedirectWindow() when compCheckRedirect() cannot allocate backing pixmap, causing BadAlloc and partly initialized validated data. This affects X.Org/Xwayland components and is listed in multiple advisorie...

CVE-2025-26597 Xorg: xwayland: buffer overflow in xkbchangetypesofkey()

A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because t...

CVE-2025-26596

A heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms differs from what is written in XkbWriteKeySyms, which may lead to a heap-based buffer overflow. Mitigation Mitigation for this issue is either not available or the currently available options...

CVE-2025-26595

CVE-2025-26595 is a buffer overflow in X.Org/Xwayland where XkbVModMaskText() uses a fixed-size stack buffer without proper bounds checking. The issue affects Xorg-x11-server-Xwayland. Advisories indicate a fix is available in newer package releases (e.g., Xwayland/Xorg servers updated to 24.1.3 ...

CVE-2025-26594

CVE-2025-26594 is a use-after-free in X.Org/Xwayland where the root cursor is kept as a global in the X server; freeing the root cursor can reference freed memory, causing a crash or compromise. Affected package: xorg-x11-server-Xwayland (and related Xorg/Xwayland components in advisories). Impac...

UBUNTU-CVE-2025-26595

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...

PT-2025-7892

Name of the Vulnerable Software and Affected Versions X.Org and Xwayland affected versions not specified Description A use-after-free flaw was found, where the root cursor is referenced as a global variable in the X server. If a client frees the root cursor, the internal reference points to freed...

Ubuntu 16.04 LTS / 18.04 LTS : X.Org X Server vulnerability (USN-7085-2)

The remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-7085-2 advisory. USN-7085-1 fixed a vulnerability in X.Org. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Tenable has...

Important: tigervnc

Issue Overview: A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo and ProcXkbGetDeviceInfo to read and write into freed memory. This can lead to local privilege elevation on systems where the X...

xorg-x11-server: XIPassiveUngrab out-of-bounds access

A vulnerability was found in X.Org. This issue occurs because the handler for the XIPassiveUngrab request accesses out-of-bounds memory when invoked with a high keycode or button code. This flaw can lead to local privilege elevation on systems where the X server runs privileged and remote code...

Advisory ROSA-SA-2023-2126

Software: tigervnc 1.8.0 OS: rosa-server79 packageevrstring: tigervnc-1.8.0-22 CVE-ID: CVE-2023-0494 BDU-ID: None CVE-Crit: HIGH CVE-DESC: A vulnerability has been discovered in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be used by ProcXkbSetDeviceInfo a...

CVE-2022-46341

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 high keycode or button code. This issue can lead to local privileges elevation on systems where the X server is running privileged an...

CVE-2022-46342

A vulnerability was found in X.Org. This security flaw occurs because the handler for the XvdiSelectVideoNotify request may write to memory after it has been freed. This issue can lead to local privileges elevation on systems where the X se...

CVE-2022-46343

A vulnerability was found in X.Org. This security flaw occurs because the handler for the ScreenSaverSetAttributes request may write to memory after it has been freed. This issue can lead to local privileges elevation on systems where the X server is running privileged and remote code execution f...

CVE-2022-4283

A vulnerability was found in X.Org. This security flaw occurs because the XkbCopyNames function left a dangling pointer to freed memory, resulting in out-of-bounds memory access on subsequent XkbGetKbdByName requests.. This issue can lead to local privileges elevation on systems where the X serve...

Vulnerability fixed in x.org

A vulnerability has been fixed in X.org. A malicious person could exploit the vulnerability to appropriate elevated privileges within the X server and thus potentially execute arbitrary code with application privileges. Under usual circumstances, an X server runs with limited permissions. -= Debi...

CVE-2016-7952

X.org libXtst before 1.2.3 allows remote X servers to cause a denial of service infinite loop via a reply in the 1 XRecordStartOfData, 2 XRecordEndOfData, or 3 XRecordClientDied category without a client sequence and with attached data...

CVE-2014-8101

The RandR extension in XFree86 4.2.0, X.Org X Window System aka X11 or X X11R6.7, and X.Org Server aka xserver and xorg-server before 1.16.3 allows remote authenticated users to cause a denial of service out-of-bounds read or write or possibly execute arbitrary code via a crafted length or index...

CVE-2012-0064

xkeyboard-config before 2.5 in X.Org before 7.6 enables certain XKB debugging functions by default, which allows physically proximate attackers to bypass an X screen lock via keyboard combinations that break the input grab...