gstreamer: gstreamer: rfbsrc/librfb Hextile heap out-of-bounds write with 16bpp framebuffer

A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit...

PT-2026-56783

Name of the Vulnerable Software and Affected Versions GStreamer affected versions not specified Description A heap buffer overflow exists in the rfbsrc plugin. The issue occurs when a client connects to a malicious RFB/VNC server that advertises a 16bpp bits per pixel framebuffer and sends...