Used CPU Purchase Triggers Valorant Ban, Exposing Anti-Cheat Risks in Second-Hand Market

Key points

• A Reddit user reported being banned from Valorant immediately after installing a used AMD Ryzen 7 5800X3D CPU purchased on September 21, 2026.
• Riot Games’ Vanguard anti-cheat system identified the CPU’s hardware ID as blacklisted due to cheating by the previous owner on August 12, 2026.
• The user claimed that other components, including the motherboard and storage drive, were also flagged, but Riot’s head of anti-cheat, Phillip Koskinas, disputed this, stating that hardware bans are game-specific and do not extend to other components.
• Koskinas confirmed that hardware bans last a maximum of four months and that support can provide the remaining time on a ban upon request.
• There is currently no way for buyers to check if a used CPU is blacklisted before purchase, raising concerns about the second-hand hardware market.

Background

This incident follows earlier reports of similar issues with Riot’s Vanguard anti-cheat system, which has been controversial for its strict policies and kernel-level integration. In June 2026, Riot introduced an optional On-Demand mode for Vanguard, allowing the anti-cheat driver to start only when a game launches, reducing the always-on requirement. However, the system still relies on hardware identifiers, such as TPM 2.0, to enforce bans, which can inadvertently affect innocent buyers of used hardware.

How outlets are covering it

TechSpot and Tom’s Hardware emphasize the risks of buying used hardware in the second-hand market, noting that anti-cheat systems can track specific components via TPM or other identifiers. Heise online highlights the technical aspects of how Riot’s Vanguard system identifies CPUs, suggesting that the TPM inside the processor is the likely method for tracking. TechPowerUp focuses on the user’s experience and the lack of recourse for innocent buyers, while also noting the rarity of such cases according to Riot. All sources agree that the incident raises concerns about the second-hand hardware market, but they differ in their emphasis on the technical details and the broader implications for anti-cheat systems.

Why it matters

This incident highlights the potential risks for consumers in the second-hand hardware market, where anti-cheat systems can inadvertently penalize innocent buyers. It also raises questions about the fairness and transparency of hardware-based bans, as there is currently no way for buyers to check if a used CPU is blacklisted before purchase. The incident may prompt further discussions about the need for more transparent and fair anti-cheat systems that do not inadvertently affect innocent users.

What to watch

Riot Games may need to address the concerns raised by this incident, potentially by introducing a way for buyers to check if a used CPU is blacklisted before purchase. Additionally, the incident may lead to further discussions about the fairness and transparency of hardware-based bans in anti-cheat systems. Consumers may also become more cautious about buying used hardware, particularly for gaming PCs, to avoid inadvertently inheriting bans from previous owners.