EIP-2026-104546

PRE-CVE

OpenBSD 3.9/4.0 - 'ld.so' Local Environment Variable Clearing

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-104546. PoCs published by Mark Dowd.

AI-analyzed exploit summary This exploit demonstrates a local privilege escalation vulnerability in OpenBSD by bypassing the _dl_unsetenv security mechanism to inject a malicious LD_PRELOAD environment variable. It includes a proof-of-concept for executing arbitrary code with elevated privileges via a shared library.

Description

OpenBSD 3.9/4.0 - 'ld.so' Local Environment Variable Clearing

Exploits (1)

exploitdb WORKING POC VERIFIED
by Mark Dowd · clocalopenbsd
https://www.exploit-db.com/exploits/29102

This exploit demonstrates a local privilege escalation vulnerability in OpenBSD by bypassing the _dl_unsetenv security mechanism to inject a malicious LD_PRELOAD environment variable. It includes a proof-of-concept for executing arbitrary code with elevated privileges via a shared library.

Classification
Working Poc 90%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: OpenBSD 3.9 and 4.0
No auth needed
Prerequisites: Local access to the target system · Presence of a root-suid binary vulnerable to environment variable manipulation
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026