CRITICAL

CVE-2020-6017

CVSS v3

9.8

CRITICAL

EPSS Score

3.2 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2020-6017 yet.

Full record on NVD

Description

Valve's Game Networking Sockets prior to version v1.2.0 improperly handles long unreliable segments in function SNP_ReceiveUnreliableSegment() when configured to support plain-text messages, leading to a Heap-Based Buffer Overflow and resulting in a memory corruption and possibly even a remote code execution.

Technical details

Published: 2020-12-03

Frequently asked questions

What is CVE-2020-6017?

Is CVE-2020-6017 actively exploited?

Active exploitation of CVE-2020-6017 has not been confirmed. Its EPSS score was 3.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-6017?

CVE-2020-6017 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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