Medium 6.5Published Feb 24, 2018

CVE-2018-7456A NULL Pointer Dereference occurs in the function TIFFPrintDirectory in tif_print.c in LibTIFF 3.9.3, 3.9.4, 3.9.5, 3.9.6, 3.9.7, 4.0.0alpha4, 4.0.0alpha5, 4.0.0alpha6, 4.0.0beta7, 4.0.0, 4.0.1, 4.0.…

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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No exploitation reported and no EPSS estimate yet.

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A NULL Pointer Dereference occurs in the function TIFFPrintDirectory in tif_print.c in LibTIFF 3.9.3, 3.9.4, 3.9.5, 3.9.6, 3.9.7, 4.0.0alpha4, 4.0.0alpha5, 4.0.0alpha6, 4.0.0beta7, 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.4beta, 4.0.5, 4.0.6, 4.0.7, 4.0.8 and 4.0.9 when using the tiffinfo tool to print crafted TIFF information, a different vulnerability than CVE-2017-18013. (This affects an earlier part of the TIFFPrintDirectory function that was not addressed by the CVE-2017-18013 patch.)

CVSS: 6.5 MEDIUM (v3.0, NVD)CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

libtiff libtiff libtiff:libtiff	4.0.9	NVD
debian debian_linux debian:debian_linux	7.0; 8.0; 9.0	NVD
canonical ubuntu_linux canonical:ubuntu_linux	14.04; 16.04; 18.04; 18.10	NVD

References

References

http://bugzilla.maptools.org/show_bug.cgi?id=2778	exploit, issue-tracking, third-party-advisory
https://access.redhat.com/errata/RHSA-2019:2051
https://access.redhat.com/errata/RHSA-2019:2053
https://github.com/xiaoqx/pocs/tree/master/libtiff	exploit, third-party-advisory
https://gitlab.com/libtiff/libtiff/commit/be4c85b16e8801a16eec25e80eb9f3dd6a96731b	patch, third-party-advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00010.html	mailing-list, third-party-advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00011.html	mailing-list, third-party-advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00002.html	mailing-list, third-party-advisory
https://usn.ubuntu.com/3864-1/	third-party-advisory
https://www.debian.org/security/2018/dsa-4349	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.