What is CVE-2016-1889?

CVE-2016-1889 is a high-severity vulnerability in FreeBSD, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2017-02-15.

How severe is CVE-2016-1889?

High severity. CVSS v3 base score is 7.8 out of 10.

Integer overflow in FreeBSD

CVE-2016-1889

Integer overflow in the bhyve hypervisor in FreeBSD 10.1, 10.2, 10.3, and 11.0 when configured with a large amount of guest memory, allows local users to gain privilege via a crafted device descriptor.

Vulnerability class: Integer Overflow

Published 2017-02-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (23.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

FreeBSD — versions 10.1, 10.2, 10.3

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

www.securitytracker.com/id/1037400 (VDB Entry, Third Party Advisory, vdb-entry)
www.freebsd.org/security/advisories/FreeBSD-SA-16:38.bhyve.asc (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2016-1889?: CVE-2016-1889 is a high-severity vulnerability in FreeBSD, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2017-02-15.
How severe is CVE-2016-1889?: High severity. CVSS v3 base score is 7.8 out of 10.