What is CVE-2016-9534?

CVE-2016-9534 is a critical-severity vulnerability in Libtiff, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2016-11-22.

How severe is CVE-2016-9534?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Libtiff

CVE-2016-9534

tif_write.c in libtiff 4.0.6 has an issue in the error code path of TIFFFlushData1() that didn't reset the tif_rawcc and tif_rawcp members. Reported as MSVR 35095, aka "TIFFFlushData1 heap-buffer-overflow."

Vulnerability class: Buffer Overflow

Published 2016-11-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.036 (88.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: 0.000

Affected products

Libtiff — versions 4.0.6

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.securityfocus.com/bid/94743 (vdb-entry)
github.com/vadz/libtiff/commit/83a4b92815ea04969d494416eaae3d4c6b338e4a (Exploit, Patch, Third Party Advisory)
rhn.redhat.com/errata/RHSA-2017-0225.html (vendor-advisory)
www.securityfocus.com/bid/94484 (VDB Entry, Third Party Advisory, vdb-entry)
www.debian.org/security/2017/dsa-3762 (vendor-advisory)

Frequently asked questions

What is CVE-2016-9534?: CVE-2016-9534 is a critical-severity vulnerability in Libtiff, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2016-11-22.
How severe is CVE-2016-9534?: Critical severity. CVSS v3 base score is 9.8 out of 10.