CVE-2026-91952 [MEDIUM] – FreeRDP versions before 3.31.0 contain an infinite-loop denial of service in the pool_deco

FreeRDP versions before 3.31.0 contain an infinite-loop denial of service in the pool_decode_rect function when decoding AVC444 metablocks with more region rectangles than preallocated worker array size. A malicious RDP server can send crafted AVC444 graphics updates causing the threaded decode path to loop indefinitely, consuming CPU and preventing normal client operation.