What is CVE-2019-6128?

CVE-2019-6128 is a high-severity vulnerability in Libtiff, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 8.8/10. Published 2019-01-11.

How severe is CVE-2019-6128?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2019-6128 known to be exploited?

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

Vulnerability in Libtiff

CVE-2019-6128

The TIFFFdOpen function in tif_unix.c in LibTIFF 4.0.10 has a memory leak, as demonstrated by pal2rgb.

Published 2019-01-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.039 (89.8th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · 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

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

Public proof-of-concept exploits

References

usn.ubuntu.com/3906-1/ (vendor-advisory, Third Party Advisory)
bugzilla.maptools.org/show_bug.cgi (Exploit, Third Party Advisory, Issue Tracking)
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/0c74a9f49b8d7a36b17b54a7428b3526d20f88a8 (Patch, Third Party Advisory)
seclists.org/bugtraq/2019/Nov/5 (mailing-list, Mailing List, Third Party Advisory)
packetstormsecurity.com/files/155095/Slackware-Security-Advisory-libtiff-Update… (VDB Entry, Third Party Advisory)
lists.debian.org/debian-lts-announce/2019/11/msg00027.html (mailing-list, Mailing List, Third Party Advisory)
security.gentoo.org/glsa/202003-25 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2019-6128?: CVE-2019-6128 is a high-severity vulnerability in Libtiff, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 8.8/10. Published 2019-01-11.
How severe is CVE-2019-6128?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2019-6128 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.