# CVE-2001-1559

## Summary

- **CVE ID:** CVE-2001-1559
- **Severity:** UNKNOWN
- **CVSS Score:** 0.02
- **CWE:** N/A
- **Published:** Jul 14, 2005
- **Last Modified:** Mar 16, 2026

## Description

The uipc system calls (uipc_syscalls.c) in OpenBSD 2.9 and 3.0 provide user mode return instead of versus rval kernel mode values to the fdrelease function, which allows local users to cause a denial of service and trigger a null dereference.

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](http://www.iss.net/security_center/static/7690.php)
- [CNA](http://archives.neohapsis.com/archives/bugtraq/2001-12/0014.html)
- [CNA](http://monkey.org/openbsd/archive/tech/0112/msg00015.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.38%
- **EPSS Percentile:** 59.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._