What is CVE-2019-7663?

CVE-2019-7663 is a medium-severity vulnerability in Libtiff. CVSS score: 6.5/10. Published 2019-02-09.

How severe is CVE-2019-7663?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2019-7663 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Libtiff

CVE-2019-7663

An Invalid Address dereference was discovered in TIFFWriteDirectoryTagTransferfunction in libtiff/tif_dirwrite.c in LibTIFF 4.0.10, affecting the cpSeparateBufToContigBuf function in tiffcp.c. Remote attackers could leverage this vulnerability to cause a denial-of-service via a crafted tiff file. This is different from CVE-2018-12900.

Published 2019-02-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.034 (88.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: -0.000

Affected products

Libtiff — versions 4.0.10
Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
Debian Linux — versions 8.0
openSUSE Leap — versions 15.0

Public proof-of-concept exploits

References

bugzilla.maptools.org/show_bug.cgi (Exploit, Patch, Third Party Advisory, Issue Tracking)
usn.ubuntu.com/3906-1/ (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2019/02/msg00026.html (mailing-list, Mailing List, Third Party Advisory)
usn.ubuntu.com/3906-2/ (vendor-advisory, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2019-04/msg00041.html (vendor-advisory, Mailing List, Third Party Advisory)
gitlab.com/libtiff/libtiff/commit/802d3cbf3043be5dce5317e140ccb1c17a6a2d39 (Patch, Third Party Advisory)
security.gentoo.org/glsa/202003-25 (vendor-advisory)
www.debian.org/security/2020/dsa-4670 (vendor-advisory)

Frequently asked questions

What is CVE-2019-7663?: CVE-2019-7663 is a medium-severity vulnerability in Libtiff. CVSS score: 6.5/10. Published 2019-02-09.
How severe is CVE-2019-7663?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2019-7663 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.