EIP-2026-100693

PRE-CVE

OpenBSD - ICMPv6 Fragment Remote Execution

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-100693. PoCs published by Core Security.

AI-analyzed exploit summary This PoC exploits a remote buffer overflow in OpenBSD's ICMPv6 fragmentation handling to execute arbitrary shellcode (int 3) by overwriting the ext_free() function pointer on the mbuf. It uses raw sockets to send crafted packets, triggering the vulnerability.

Description

OpenBSD - ICMPv6 Fragment Remote Execution

Exploits (1)

exploitdb WORKING POC VERIFIED
by Core Security · pythonremotebsd
https://www.exploit-db.com/exploits/3491

This PoC exploits a remote buffer overflow in OpenBSD's ICMPv6 fragmentation handling to execute arbitrary shellcode (int 3) by overwriting the ext_free() function pointer on the mbuf. It uses raw sockets to send crafted packets, triggering the vulnerability.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: OpenBSD 4.0 CURRENT (GENERIC)
No auth needed
Prerequisites: Raw socket support · PF_PACKET family support · Target system running vulnerable OpenBSD version
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026