Steam Adds Secure Boot Check, Blocks Game Launches When Unity Exploit Attempts Are Detected

Developers are steadily rolling out popular, in-demand features to Steam.

Valve has released another update for the Steam client. The team responded to reports about a Unity vulnerability and implemented various browser and other improvements.

Notable changes and improvements include:

• Mitigations for the Unity vulnerability CVE-2025-59489 have been added; the client will block a game from launching through Steam if an attempt to exploit the flaw is detected.
• A warning about the end of support for 32-bit versions of Windows has been introduced. At present, Windows 10 32-bit is the only 32-bit OS still supported by Steam — support will end on January 1, 2026.
• Added the ability to cycle through browser tabs using the CTRL+TAB keyboard shortcut.
• (Overlay): Fixed an issue in D3D12 games that could occasionally cause a crash when rapidly opening and closing overlay sections (for example, Notes). This could appear as the game or the GPU freezing.
• (Game Recording): Improved performance while recording for some titles that use Vulkan rendering.
• (Windows): A check has been added to detect whether Secure Boot and TPM are enabled on the current machine. You can view this information in the client by going to: “Help” —> “System Information” -> scroll to the “OS Version” section.

Full details of the October Steam client update are available at the following link: Steam.

Source: iXBT.games