VulnerabilityModified
CVE-2016-6239
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.
MEDIUM 5.5EPSS 0.48%
Does this matter?
Lower severity and a low EPSS score (0.48%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.0
- 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.48% probability · 41th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- openbsd/openbsd
- Source
- cve@mitre.org
EPSS 0.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openbsd.org/errata58.htmlRelease Notes
- http://www.openbsd.org/errata59.htmlRelease Notes
- http://www.openwall.com/lists/oss-security/2016/07/14/5Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/07/17/7Exploit, Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/91805
- http://www.securitytracker.com/id/1036318
- http://www.openbsd.org/errata58.htmlRelease Notes
- http://www.openbsd.org/errata59.htmlRelease Notes
- http://www.openwall.com/lists/oss-security/2016/07/14/5Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/07/17/7Exploit, Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/91805
- http://www.securitytracker.com/id/1036318
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.