CVE-2020-6019: Valvesoftware Game Networking Sockets

High severity, CVSS 7.5. EPSS: 2.8% chance of exploitation in the next 30 days.

Valve's Game Networking Sockets prior to version v1.2.0 improperly handles inlined statistics messages in function CConnectionTransportUDPBase::Received_Data(), leading to an exception thrown from libprotobuf and resulting in a crash.

Affected products

• Valvesoftware Game Networking Sockets: before 1.2.0 (fixed in 1.2.0)

Published 2020-11-13. Last modified 2026-06-17.