The PC Patch 1.7, along with the Linux Dedicated server files can be found here:
http://callofduty.com/update/
The final release notes are as follows:
-Fixed an MP server crash exploit.
-Fixed a voice chat crash on systems with no default recording device selected.
-Fixed an issue causing erroneous duplicate qport errors.
-Server admins can disable team switching by setting g_allow_teamchange to 0. Players will be restricted to Auto-Assign in team-based gametypes.
Additionally, the Linux 1.7 dedicated server will include:
- Fixes impure server warnings for custom maps.
- Fixes HTTP redirect for custom maps.
Source