Medium severity5.5NVD Advisory· Published Dec 31, 2001· Updated Jun 16, 2026

CVE-2001-1559

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

OpenBSD/OpenBSD3 versions
cpe:2.3:o:openbsd:openbsd:2.9:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:openbsd:openbsd:2.9:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:3.0:*:*:*:*:*:*:*
- (no CPE)range: = 2.9, 3.0

Patches

Vulnerability mechanics

References

archives.neohapsis.com/archives/bugtraq/2001-12/0014.htmlnvdBroken LinkExploit
monkey.org/openbsd/archive/tech/0112/msg00015.htmlnvdBroken LinkExploit
www.iss.net/security_center/static/7690.phpnvdBroken Link

News mentions

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cvss	0.358
epss	0.001
exploit	0.030
kev	0.000
patch	0.000
ransomware	0.000