FiveM crashes with legitimacy.dll!SecurityPatternLoadHints (0x439fc)

[karma.astria]

What is the issue you’re having?

FiveM crashes immediately on startup with the following error:

legitimacy.dll!SecurityPatternLoadHints (0x439fc)
Crash signature: legitimacy.dll+2F276C
Latest Report ID: si-de40044beecb4ca381e4e2a123cb7fd1

The crash occurs consistently every time I try to launch FiveM.

What have you tried already to fix the issue?

I have attempted all the following steps, but the issue persists:

Full uninstall/reinstall of FiveM and GTA V (Steam version)

Switched to Canary version (fivem://setChannel?canary)

Cleared FiveM cache

Verified GTA V game files on Steam

Disabled Windows Defender Real-Time Protection

Turned off Core Isolation (Memory Integrity)

Disabled Hyper-V, Virtualization-Based Security (VBS), and Virtual Machine Platform

Uninstalled Riot Vanguard (VALORANT anti-cheat)

Checked for the DigitalEntitlements folder (not present)

Ran without any peripherals (e.g. headset, controller)

Tried both normal and administrator launch (no difference)

What server did you get this issue on?

None. The crash happens before I can reach the main menu or connect to any server.

Error screenshot(s)

Windows version

Windows 10 Pro - Version 22H2 (Build 19045.5247)

System specifications

• CPU: AMD Ryzen 7 7800X3D 8-Core Processor
• GPU: NVIDIA GeForce RTX 4060 Ti
• RAM: 64GB DDR5
• Storage: 1.82TB SSD (NVMe)

Antivirus software

Windows Defender (Riot Vanguard was installed before, but now uninstalled)

CitizenFX crash zip file (‘Save information’ on a crash)

CfxCrashDump_2025_07_25_14_45_23.zip (260 KB)

Additional comments

This crash seems to be affecting other users as well, based on forum and Reddit reports.
If you need additional debug logs or system info, I am happy to provide them.

[system]

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