What is CVE-2017-11636?

CVE-2017-11636 is a critical-severity vulnerability in Graphicsmagick, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2017-07-26.

How severe is CVE-2017-11636?

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

Buffer overflow in Graphicsmagick

CVE-2017-11636

GraphicsMagick 1.3.26 has a heap overflow in the WriteRGBImage() function in coders/rgb.c when processing multiple frames that have non-identical widths.

Vulnerability class: Buffer Overflow

Published 2017-07-26 · 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: 0.031 (87.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000

Affected products

Graphicsmagick — versions 1.3.26

Weakness classification (CWE)

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

References

hg.code.sf.net/p/graphicsmagick/code/rev/39961adf974c (Third Party Advisory)
www.debian.org/security/2018/dsa-4321 (vendor-advisory)
lists.debian.org/debian-lts-announce/2018/06/msg00009.html (mailing-list)
www.securityfocus.com/bid/99978 (VDB Entry, Third Party Advisory, vdb-entry)
usn.ubuntu.com/4206-1/ (vendor-advisory)

Frequently asked questions

What is CVE-2017-11636?: CVE-2017-11636 is a critical-severity vulnerability in Graphicsmagick, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2017-07-26.
How severe is CVE-2017-11636?: Critical severity. CVSS v3 base score is 9.8 out of 10.