CVE-2016-6239

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% 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

The mmap extension __MAP_NOFAULT in OpenBSD 5.8 and 5.9 allows attackers to cause a denial of service (kernel panic and crash) via a large size value.

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.securitytracker.com/id/1036318
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.securitytracker.com/id/1036318

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