Update history
Latest Left 4 Dead 2 updates
Search patches, hotfixes, and dev posts. Load more to keep browsing the timeline.
Browse updates
Published changes
Search updates. Filter by source or date. Open any row for the full patch notes, or load more to continue the timeline.
- Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: Fixed another exploit where malicious network packets could severely degrade server performance. - Fixed a client exploit that could cause long server stalls. - Fixed a pot…
Announcement1 changeFixPerformance - Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: Blocked an exploit that could forcibly disconnect a player from any server, even when playing a local game.
Announcement1 changeFixServer - Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: Fixed two exploits that could crash remote servers. - Fixed missing lobby state messages. - Fixed community server searches not always returning the full set of lowest-ping…
Announcement1 changeFixPerformance - Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: Improved the reliability of "mm_dedicated_force_official_servers" to find the lowest ping server across the supplied IPs.
Announcement1 changeFixPerformance - Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: Fixed several matchmaking lobby exploits. - The cvar "mm_dedicated_force_servers" now only applies to lobbies with the "Best Available Dedicated" server type as originally…
Security1 change - Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: Fixed an exploit where reliable network fragments could stall out a server indefinitely. - Re-enabled uploads by default so sprays will work again.
Announcement1 changeFixPerformance - Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: Fixed a degenerate case where malformed network packets could delay processing the remainder of the stream, severely impacting server performance.
Announcement1 changeServer - Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: Fixed possible corruption of the unreliable network stream during high network loads. - Increased default command limits to prevent spurious disconnects.
Security1 changeFix - Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. Added protections against malformed network packets. - Reduced server-side command limits per client. - Fixed a regression in script handling of regular expressions. - Fixe…
Security1 changeFix - Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: - Fixed several vulnerabilities and exploits reported via HackerOne.
- Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. Tank Run mutation fixes based on feedback from Tank Run community groups: - Removed auto-revive. - Re-enabled water slowdown. - Re-enabled crawling when incapped. - Lowered…
- Left 4 Dead 2
Update - Left 4 Dead 2
An update has been released for Left 4 Dead 2. - Fixed several exploits reported via HackerOne. - Fixed controller navigation in some menus. - Fixed not being able to open the train door in Crash Course when playing the…
- Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. - Fixed console chat regression from previous update.
- Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. - Fixed a regression that caused some scripted special zombie spawns to fail. Fixes Tank Run mutation.
- Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. - Fixed several crash and RCE exploits, all reported via HackerOne.
- Left 4 Dead 2
Left 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. - Update to DXVK Version 2.0 - Fixed potential exploit to remotely crash servers

