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 severity · published Mar 7, 2017

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

5.5

CVSS

0.5%

EPSS

On KEV

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 vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack vector

Local

Complexity

Low

Privileges

Low

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.5% · higher than 42% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Openbsd · Openbsd

5.8; 5.9 · source: NVD

Affected product

Openbsd

All Openbsd CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2016-6239

CVE.org

https://www.cve.org/CVERecord?id=CVE-2016-6239

Release Notes

http://www.openbsd.org/errata58.html

Release Notes

http://www.openbsd.org/errata59.html

Mailing List

http://www.openwall.com/lists/oss-security/2016/07/14/5

Exploit

http://www.openwall.com/lists/oss-security/2016/07/17/7

www.securityfocus.com

http://www.securityfocus.com/bid/91805

www.securitytracker.com

http://www.securitytracker.com/id/1036318