EIP-2026-103236

PRE-CVE

Valve Software Half-Life Server 3.1.1.0 - Multiplayer Request Buffer Overflow

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-103236. PoCs published by KnbykL.

AI-analyzed exploit summary This is a functional remote exploit for a buffer overflow vulnerability in Half-Life servers (v3.1.1.0). It leverages a stack-based overflow to execute arbitrary shellcode, binding a shell to port 30464. The exploit bypasses address filtering by using a 'call *%eax' instruction at a fixed offset (0x0804AE93).

Description

Valve Software Half-Life Server 3.1.1.0 - Multiplayer Request Buffer Overflow

Exploits (1)

exploitdb WORKING POC VERIFIED
by KnbykL · cremotelinux
https://www.exploit-db.com/exploits/22969

This is a functional remote exploit for a buffer overflow vulnerability in Half-Life servers (v3.1.1.0). It leverages a stack-based overflow to execute arbitrary shellcode, binding a shell to port 30464. The exploit bypasses address filtering by using a 'call *%eax' instruction at a fixed offset (0x0804AE93).

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Half-Life Server v3.1.1.0 (Linux)
No auth needed
Prerequisites: Network access to the vulnerable Half-Life server on UDP port 27015
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026