CVE-1999-1214: The asynchronous I/O facility in 4.4 BSD kernel does not check user credentials when setting the recipient...

Security readout for executives and security teams

This is a legacy local denial-of-service flaw in the 4.4 BSD kernel's asynchronous I/O notification handling. A local user could direct I/O notification signals at arbitrary process IDs because credentials were not checked. The practical risk is disruption on old BSD-based systems, not remote compromise based on the supplied sources. Exposure is most plausible on legacy systems running the affected 4.4 BSD kernel asynchronous I/O facility. The source bundle does not enumerate affected vendors, products, or versions, so vulnerability managers should not assume broad exposure without inventory evidence. Treat this as a legacy exposure question. It is unlikely to affect modern supported platforms unless old BSD systems remain in production. Prioritize confirmation through asset inventory before allocating emergency response effort. Mitigation focus: Review the OpenBSD advisory and relevant vendor guidance for historical fix details.; Upgrade or retire systems running vulnerable 4.4 BSD kernel code.; Restrict untrusted local shell access on any potentially affected hosts..

Prepared

Jul 1, 2026, 08:03 UTC (UTC+00:00)

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