What’s Vulnerable › Vulnerabilities

CVE-2016-6243

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-03-07 · updated 2026-06-17
• Weakness: CWE-20

Description

thrsleep in kern/kern_synch.c in OpenBSD 5.8 and 5.9 allows local users to cause a denial of service (kernel panic) via a crafted value in the tsp parameter of the __thrsleep system call.

Affected products

• OpenBSD: 5.8, 5.9

References

• http://www.openbsd.org/errata58.html
• http://www.openbsd.org/errata59.html
• http://www.openwall.com/lists/oss-security/2016/07/14/5
• http://www.openwall.com/lists/oss-security/2016/07/17/7
• http://www.securityfocus.com/bid/91805
• http://www.openbsd.org/errata58.html
• http://www.openbsd.org/errata59.html
• http://www.openwall.com/lists/oss-security/2016/07/14/5
• http://www.openwall.com/lists/oss-security/2016/07/17/7
• http://www.securityfocus.com/bid/91805

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