In FreeRDP less than or equal to 2.0.0, there is an out-of-bounds read in rfxprocessmessage_tileset. Invalid data fed to RFX decoder results in garbage on screen (as colors). This has been patched in 2.1.0.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-11043.json"