CVE-2026-23531 FreeRDP has heap-buffer-overflow in clear_decompress

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, in ClearCodec, when glyphData is present, cleardecompress calls freerdpimagecopynooverlap without validating the destination rectangle, allowing an out-of-bounds read/write via crafted RDPGFX surface updates...

The vulnerability of the `clear_decompress_subcode_rlex` function in the FreeRDP remote desktop protocol allows a intruder to trigger a service failure.

The vulnerability of the cleardecompresssubcoderlex function in the FreeRDP remote desktop protocol is related to reading beyond the buffer boundaries in memory. Exploiting this vulnerability can allow a malicious actor to cause service failures remotely...