CVE-2005-0740: n/a vulnerability

CVE-2005-0740: The TCP stack (tcp_input.c) in OpenBSD 3.5 and 3.6 allows remote attackers to cause a denial of service (sy...

The TCP stack (tcp_input.c) in OpenBSD 3.5 and 3.6 allows remote attackers to cause a denial of service (system panic) via crafted values in the TCP timestamp option, which causes invalid arguments to be used when calculating the retransmit timeout.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 21:21 UTC (UTC+00:00)

Security readout for executives and security teams

This is a remote denial-of-service flaw in the TCP networking code of OpenBSD 3.5 and 3.6. A malformed TCP timestamp option could trigger a system panic, taking the host offline. The business impact is availability loss, mainly for legacy systems still running these releases. Exposure is likely limited to obsolete OpenBSD 3.5 or 3.6 hosts that can receive untrusted TCP traffic. Modern supported OpenBSD systems are not identified as affected in the provided sources. Prioritize if legacy OpenBSD 3.5 or 3.6 systems support business-critical services or are internet reachable. Otherwise, handle through legacy-system remediation and decommissioning work. Mitigation focus: Identify any OpenBSD 3.5 or 3.6 systems in asset inventory.; Apply the OpenBSD January 11, 2005 reliability erratum where applicable.; Upgrade or retire unsupported OpenBSD 3.5 and 3.6 hosts..

Prepared: Jun 29, 2026, 23:27 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: Mar 13, 2005, 05:00 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

n/an/an/aListed

Weakness

CWE details

No CWE listed

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