CVE-2026-109939

FreeRDP 3.27.1 before 3.32.0 contains a NULL pointer dereference in update read cache bitmap v3 order() in libfreerdp/core/orders.c, which accesses the client bitmap cache when the CBR3 DO NOT CACHE flag is set, even though the cache is not yet initialized before Demand Active. A malicious or compromised RDP server can send a Cache Bitmap V3 order during connection setup to crash a connecting client that has enabled the non-default Bitmap Cache V3 feature (/cache:codec:<rfx|nsc|jpeg>).