CVE-2026-40254 FreeRDP: contains_dotdot() off-by-one allows drive channel path traversal via terminal ..

FreeRDP is a free implementation of the Remote Desktop Protocol. Versions prior to 3.25.0 have an off-by-one in the path traversal filter in channels/drive/client/drivefile.c. The containsdotdot function catches ../ and ..\ mid-path but misses .. when it's the last component with no trailing...