UPX is not affected. It sets the appropriate permissions on its pages. This is the difference between legit and non legit. A legit software can set the permiss

UPX is not affected. It sets the appropriate permissions on its pages. This is the difference between legit and non legit. A legit software can set the permissions. A remote RCE exploit may be able to insert a payload in memory but it won't be able to change permissions.