xorg: xwayland: Out-of-bounds write in CreatePointerBarrierClient()

An out-of-bounds write flaw was found in X.Org and Xwayland. The function GetBarrierDevice searches for the pointer device based on its device ID and returns the matching value, or supposedly NULL, if no match was found. However, the code will return the last element of the list if no matching...

xorg-x11-server: tigervnc: heap-based buffer overflow privilege escalation vulnerability

A flaw was found in the X.org server. Due to improperly tracked allocation size in XkbSetCompatMap, a local attacker may be able to trigger a buffer overflow condition via a specially crafted payload, leading to denial of service or local privilege escalation in distributions where the X.org serv...

Xorg: xwayland: Buffer overflow in XkbVModMaskText()

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...

xorg: xwayland: Use-after-free in PlayReleasedEvents()

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...

xorg: xwayland: Use of uninitialized pointer in compRedirectWindow()

An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function compCheckRedirect may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow will return a BadAlloc error without validating the window tree marked just before, which leaves the...

xorg: xwayland: Out-of-bounds write in CreatePointerBarrierClient()

An out-of-bounds write flaw was found in X.Org and Xwayland. The function GetBarrierDevice searches for the pointer device based on its device ID and returns the matching value, or supposedly NULL, if no match was found. However, the code will return the last element of the list if no matching...

xorg: xwayland: Use-after-free in SyncInitTrigger()

A use-after-free flaw was found in X.Org and Xwayland. When changing an alarm, the values of the change mask are evaluated one after the other, changing the trigger values as requested, and eventually, SyncInitTrigger is called. If one of the changes triggers an error, the function will return...

Moderate: Red Hat Security Advisory: xorg-x11-server security update

An update for xorg-x11-server is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability...

xorg: xwayland: Heap overflow in XkbWriteKeySyms()

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...

ALSA-2025:7163 Moderate: xorg-x11-server security update

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Security Fixes: xorg-x11-server: tigervnc: heap-based buffer overflow privilege escalation vulnerability CVE-2024-9632 X.Org:...

Moderate: xorg-x11-server security update

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Security Fixes: xorg-x11-server: tigervnc: heap-based buffer overflow privilege escalation vulnerability CVE-2024-9632 X.Org:...

xorg: xwayland: Use of uninitialized pointer in compRedirectWindow()

An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function compCheckRedirect may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow will return a BadAlloc error without validating the window tree marked just before, which leaves the...

xorg: xwayland: Use-after-free in PlayReleasedEvents()

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...

CLSA-2025-1744632481 tigervnc: Fix of CVE-2023-5380

CVE-2023-5380: xorg-x11-server: fix use-after-free flaw causing X server crash in specific multi-screen Zaphod mode configuration by handling window destruction properly...

Medium: xorg-x11-server

Issue Overview: In X.Org X server 20.11 through 21.1.16, when a client application uses easystroke for mouse gestures, the main thread modifies various data structures used by the input thread without acquiring a lock, aka a race condition. In particular, AttachDevice in dix/devices.c does not...

The vulnerability of the PlayReleasedEvents() function in the Wayland protocol for X.Org XWayland, which is implemented in the X Window System X.Org Server, allows a perpetrator to execute arbitrary code.

The vulnerability of the PlayReleasedEvents function in the Wayland protocol for X.Org XWayland is related to the use of memory after it is freed. Exploiting this vulnerability can allow a attacker to execute arbitrary code...

CLSA-2025-1744223313 tigervnc: Fix of 3 CVEs

CVE-2024-31080: xorg-x11-server: fix heap-based buffer over-read vulnerability in ProcXIGetSelectedEvents by avoiding byte-swapped length values in replies - CVE-2024-9632: xorg-x11-server: fix improperly tracked allocation size in XkbSetCompatMap to prevent buffer overflow condition -...

CLSA-2025-1744213437 tigervnc: Fix of 3 CVEs

CVE-2023-6816: xorg-x11-server: fix use-after-free issue by adding check to allocate sufficient space for logical button maps to prevent heap overflow in DeviceFocusEvent and XIQueryPointer replies - CVE-2023-5367: xorg-x11-server: correct buffer offset handling in XIChangeDeviceProperty and...

xorg-x11-server security update

1.20.4-29.0.1 - Fixed CVE-2025-26594 CVE-2025-26595 CVE-2025-26596 - CVE-2025-26597 CVE-2025-26598 CVE-2025-26599 CVE-2025-26600 - CVE-2025-26601 Orabug: 37712847...

Oracle Linux 7 : xorg-x11-server (ELSA-2025-2879)

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2025-2879 advisory. - Fixed CVE-2025-26594 CVE-2025-26595 CVE-2025-26596 - CVE-2025-26597 CVE-2025-26598 CVE-2025-26599 CVE-2025-26600 Tenable has extracted the preceding...