CVE-2020-6019

Name: CVE-2020-6019
Creator: NVD / NIST
Published: 2020-11-13T16:15:18.463+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.79%

Last modified Jun 17, 2026

CVE-2020-6019 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 2.79% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.79%

84.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-248

Affected Software

Vendor	Product	Versions
Valvesoftware	Game Networking Sockets	< 1.2.0

References

https://github.com/ValveSoftware/GameNetworkingSockets/commit/d944a10808891d202bb1d5e1998de6e0423af678Patch, Third Party Advisory
https://research.checkpoint.com/2020/game-on-finding-vulnerabilities-in-valves-steam-sockets/Exploit, Third Party Advisory
https://github.com/ValveSoftware/GameNetworkingSockets/commit/d944a10808891d202bb1d5e1998de6e0423af678Patch, Third Party Advisory
https://research.checkpoint.com/2020/game-on-finding-vulnerabilities-in-valves-steam-sockets/Exploit, Third Party Advisory

Timeline

Published: Nov 13, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-6019?

How severe is CVE-2020-6019?

CVE-2020-6019 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.79% probability of exploitation in the next 30 days.

How do I fix CVE-2020-6019?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-6019?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST