May 2025 Patch

Hello everyone,

A new patch has been released. This one contains mostly stability and security fixes.

Servers and clients are recommended to update as soon as possible.
The change list is as follows:

• Throw a non halting Lua error when hitting Lua file limit, to let players know that they have hit the limit
• Fixed a regression crash on Linux when almost finished loading a map
• Prevent crashes with steamworks library when used too early on dedicated servers
• Fixed console spam about invalid sprite orientation when the sprite material is simply missing
• Fixed HLTV clients being kicked due to mismatching SteamID
• Fixed a crash to do with env_projected_texture's texture
• Fixed some security issues reported on HackerOne
• Remove unnecessary return value in WorldPickerMouseDisable hook so GM:VGUIMousePressAllowed hook works more reliably for addons (Community Contribution)
• Fixed Lua error with creator tool when trying to spawn NPCs that do not exist on the server (Community Contribution)
• Blocked .vdf and specific .cfg files from being accessible by the Lua file library
• Added one more known Lua backdoor URL to HTTP blacklist
• Increased default value of mem_max_heapsize to 512, and block it from being changed by Lua API
• Block datacachesize convar from being changed by Lua API, to prevent crashes when set to invalid values
• Fixed monitor (and potentially other) materials in Hammer acting strangely when using "Fit" option in texture application tool.

The entire change list can also be found on our website:
https://gmod.facepunch.com/news/may-2025-patch

Edit: For people still experiencing crashes when pressing "Start Game" - delete your bin/ and garrysmod/bin/ folders and verify game cache integrity through Steam. Some 3rd party files/programs that may have been put into the game's folder by the player are causing issues, such as graphics modifications. Updating those files might also work.