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Riot Games is making an anti-cheat change that could be rough on older PCs

a day ago
https://arstechnica.com/gadgets/2025/12/some-valorant-players-need-to-update-their-pc-bios-to-keep-anti-cheat-software-happy/
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  • #Anti-Cheat
  • #PC Gaming
  • #Security
  • Most competitive PC multiplayer games use kernel-level anti-cheat software with elevated privileges.
  • Anti-cheat software now requires Windows security features like Secure Boot, TPM 2.0, and virtualization-based memory integrity.
  • Riot Games (Valorant, League of Legends) is implementing a new BIOS update requirement due to a UEFI bug.
  • The bug affects the IOMMU on some UEFI-based motherboards, allowing DMA protection to be bypassed during boot.
  • Patches (CVE-2025-11901, CVE-2025‑14302, CVE-2025-14303, CVE-2025-14304) fix the DMA protection vulnerability.
  • Riot will enforce BIOS updates only for 'restricted' Valorant players whose systems resemble cheaters' setups.
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