A Deep Dive into the GetProcessHandleFromHwnd API

Posted by James Forshaw In my previous blog post I mentioned the GetProcessHandleFromHwnd API. This was an API I didn’t know existed until I found a publicly disclosed UAC bypass using the Quick Assist UI Access application. This API looked interesting so I thought I should take a closer look. I...

AlmaLinux 9 : firefox (ALSA-2026:3339)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:3339 advisory. libvpx: Heap buffer overflow in libvpx CVE-2026-2447 firefox: Invalid pointer in the JavaScript Engine component CVE-2026-2785 firefox: Memory safety bugs...

CVE-2026-26986

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, railwindowfree dereferences a freed xfAppWindow pointer during HashTableFree cleanup because xfrailwindowcommon calls freeappWindow on title allocation failure without first removing the entry from the...

UBUNTU-CVE-2026-26986

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, railwindowfree dereferences a freed xfAppWindow pointer during HashTableFree cleanup because xfrailwindowcommon calls freeappWindow on title allocation failure without first removing the entry from the...

CVE-2026-26986

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, railwindowfree dereferences a freed xfAppWindow pointer during HashTableFree cleanup because xfrailwindowcommon calls freeappWindow on title allocation failure without first removing the entry from the...

CVE-2026-25952

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, xfSetWindowMinMaxInfo dereferences a freed xfAppWindow pointer because xfrailgetwindow in xfrailserverminmaxinfo returns an unprotected pointer from the railWindows hash table, and the main thread can...

CVE-2026-25953

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, xfAppUpdateWindowFromSurface reads from a freed xfAppWindow because the RDPGFX DVC thread obtains a bare pointer via xfrailgetwindow without any lifetime protection, while the main thread can concurrently...

CVE-2026-25952

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, xfSetWindowMinMaxInfo dereferences a freed xfAppWindow pointer because xfrailgetwindow in xfrailserverminmaxinfo returns an unprotected pointer from the railWindows hash table, and the main thread can...

UBUNTU-CVE-2026-25955

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, xfAppUpdateWindowFromSurface reuses a cached XImage whose data pointer references a freed RDPGFX surface buffer, because gdiDeleteSurface frees surface-data without invalidating the appWindow-image that...

UBUNTU-CVE-2026-26271

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a buffer overread in freerdpimagecopyfromicondata libfreerdp/codec/color.c can be triggered by crafted RDP Window Icon TSICONINFO data. The bug is reachable over the network when a client processes icon data...

UBUNTU-CVE-2026-25953

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, xfAppUpdateWindowFromSurface reads from a freed xfAppWindow because the RDPGFX DVC thread obtains a bare pointer via xfrailgetwindow without any lifetime protection, while the main thread can concurrently...

UBUNTU-CVE-2026-25954

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, xfrailserverlocalmovesize dereferences a freed xfAppWindow pointer because xfrailgetwindow returns an unprotected pointer from the railWindows hash table, and the main thread can concurrently delete the wind...

CVE-2026-26986

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, railwindowfree dereferences a freed xfAppWindow pointer during HashTableFree cleanup because xfrailwindowcommon calls freeappWindow on title allocation failure without first removing the entry from the...

CVE-2026-26986 FreeRDP has heap-use-after-free in rail_window_free

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, railwindowfree dereferences a freed xfAppWindow pointer during HashTableFree cleanup because xfrailwindowcommon calls freeappWindow on title allocation failure without first removing the entry from the...

CVE-2026-26986

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, railwindowfree dereferences a freed xfAppWindow pointer during HashTableFree cleanup because xfrailwindowcommon calls freeappWindow on title allocation failure without first removing the entry from the...

CVE-2026-26986

CVE-2026-26986 affects FreeRDP prior to version 3.23.0. The root cause is a use-after-free: during HashTable_Free cleanup, xf_rail_window_common frees appWindow without first removing the corresponding entry from the railWindows hash table, leaving a dangling pointer that is freed again on discon...

CVE-2026-26986 FreeRDP has heap-use-after-free in rail_window_free

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, railwindowfree dereferences a freed xfAppWindow pointer during HashTableFree cleanup because xfrailwindowcommon calls freeappWindow on title allocation failure without first removing the entry from the...

CVE-2026-26271

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a buffer overread in freerdpimagecopyfromicondata libfreerdp/codec/color.c can be triggered by crafted RDP Window Icon TSICONINFO data. The bug is reachable over the network when a client processes icon data...

CVE-2026-26271 Buffer Overread in FreeRDP Icon Processing

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a buffer overread in freerdpimagecopyfromicondata libfreerdp/codec/color.c can be triggered by crafted RDP Window Icon TSICONINFO data. The bug is reachable over the network when a client processes icon data...

CVE-2026-26271

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a buffer overread in freerdpimagecopyfromicondata libfreerdp/codec/color.c can be triggered by crafted RDP Window Icon TSICONINFO data. The bug is reachable over the network when a client processes icon data...