CVE-2020-6016 json
Valve's Game Networking Sockets prior to version v1.2.0 improperly handles unreliable segments with negative offsets in function SNP_Receiv…
published 2020-11-18 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-27170
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 6.0%
- EPSS 6.0% chance of exploitation in 30 days, percentile 93%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- valvesoftware game_networking_sockets 1.2.0
Exploit prediction
6.00% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- research.checkpoint.com https://research.checkpoint.com/2020/game-on-finding-vulnerabilities-in-valves-steam-sockets/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Affected products
- n/a Game Networking Sockets
Classification
References
-
github.com
/ValveSoftware/GameNetworkingSockets/commit/e0c86dcb9139771db3db0cfdb1fb8bef0af19c43
patch, third-party-advisory
-
research.checkpoint.com
/2020/game-on-finding-vulnerabilities-in-valves-steam-sockets/
exploit, third-party-advisory
Sources
- CVE List CVE-2020-6016
- NVD CVE-2020-6016
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