VULNERABILITY INTELLIGENCE

CVE-2020-6016

CVSS score9.8 CRITICAL

EPSS probability6.00%

CISA KEVNot currently listed

Published2020-11-18

Last modified2026-06-17

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

Description

Valve's Game Networking Sockets prior to version v1.2.0 improperly handles unreliable segments with negative offsets in function SNP_ReceiveUnreliableSegment(), leading to a Heap-Based Buffer Underflow and a free() of memory not from the heap, resulting in a memory corruption and probably even a remote code execution.

Weakness classification

cve@checkpoint.com: CWE-590
nvd@nist.gov: CWE-787

Primary references

cve@checkpoint.com — Patch, Third Party Advisory
cve@checkpoint.com — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory