CVE-2001-1559: n/a vulnerability

CVE-2001-1559: The uipc system calls (uipc_syscalls.c) in OpenBSD 2.9 and 3.0 provide user mode return instead of versus r...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 16, 2024, 16:28 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2001-1559 is an old OpenBSD kernel denial-of-service flaw. On OpenBSD 2.9 and 3.0, a local user could trigger a null dereference in uipc system call handling and crash the system. It is mainly a concern for legacy systems that still allow local user access. Exposure appears limited to OpenBSD 2.9 and 3.0 systems with local users. These versions are very old, so typical exposure is legacy, embedded, lab, or unmanaged infrastructure rather than modern supported deployments. Treat this as a legacy risk cleanup item unless affected OpenBSD hosts still support shared or untrusted local access. Business urgency increases when an affected host provides critical availability or cannot be quickly upgraded. Mitigation focus: Inventory for OpenBSD 2.9 and 3.0 systems.; Check OpenBSD vendor history for the applicable fix or upgrade path.; Retire or upgrade unsupported affected hosts where feasible..

Prepared: Jun 29, 2026, 19:05 UTC (UTC+00:00)

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

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jul 14, 2005, 04:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

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1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

CWE details

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