CVE-2026-23530

A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol. This vulnerability occurs because the freerdp_bitmap_decompress_planar function does not properly validate bitmap dimensions when decompressing planar bitmap data. A malicious server can exploit this by sending specially crafted bitmap data, leading to a client-side heap buffer overflow. This can cause a crash (Denial of Service) and potentially allow for arbitrary code execution on the client system.

For this vulnerability to be exploited, a client must connect to a maliciously-configured server. Red Hat recommends that FreeRDP clients are only used to connect to trusted servers.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.