What is CVE-2016-6223?

CVE-2016-6223 is a critical-severity vulnerability in Libtiff, classified under CWE-189. CVSS score: 9.1/10. Published 2017-01-23.

How severe is CVE-2016-6223?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Libtiff

CVE-2016-6223

The TIFFReadRawStrip1 and TIFFReadRawTile1 functions in tif_read.c in libtiff before 4.0.7 allows remote attackers to cause a denial of service (crash) or possibly obtain sensitive information via a negative index in a file-content buffer.

Published 2017-01-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.033 (88.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000

Affected products

Libtiff

Weakness classification (CWE)

CWE-189

References

security.gentoo.org/glsa/201701-16 (vendor-advisory)
libtiff.maptools.org/v4.0.7.html (Patch)
www.openwall.com/lists/oss-security/2016/07/14/4 (mailing-list, Mailing List)
www.debian.org/security/2017/dsa-3762 (vendor-advisory)
www.openwall.com/lists/oss-security/2016/07/13/3 (mailing-list, Mailing List)
www.securityfocus.com/bid/91741 (vdb-entry)

Frequently asked questions

What is CVE-2016-6223?: CVE-2016-6223 is a critical-severity vulnerability in Libtiff, classified under CWE-189. CVSS score: 9.1/10. Published 2017-01-23.
How severe is CVE-2016-6223?: Critical severity. CVSS v3 base score is 9.1 out of 10.