CVE-2006-6164: The _dl_unsetenv function in loader.c in the ELF ld.so in OpenBSD 3.9 and 4.0 does not properly remove dupl...

Security readout for executives and security teams

This flaw affects old OpenBSD 3.9 and 4.0 systems. A local user could bypass part of the dynamic loader’s environment cleanup and potentially influence privileged program loading. The business risk is mainly legacy-host privilege escalation, not remote compromise. Exposure is likely limited to legacy OpenBSD 3.9 or 4.0 installations, especially systems allowing local shell access or running local multi-user workloads. The provided affected-product metadata is sparse, but the CVE description and OpenBSD errata identify those releases. Prioritize remediation if any affected OpenBSD systems still exist, particularly shared or internet-adjacent administrative hosts. For modern environments without OpenBSD 3.9 or 4.0, urgency is low but asset verification is still warranted. Mitigation focus: Apply the OpenBSD 3.9 or 4.0 ld.so errata patch where those releases are still present.; Prefer upgrading legacy OpenBSD hosts to a supported release.; Limit untrusted local interactive access until legacy hosts are patched or retired..

Prepared

Jun 29, 2026, 09:12 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.