What is CVE-2020-12268?

CVE-2020-12268 is a critical-severity vulnerability in Artifex Jbig2dec, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-04-27.

How severe is CVE-2020-12268?

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

Buffer overflow in Artifex Jbig2dec

CVE-2020-12268

jbig2_image_compose in jbig2_image.c in Artifex jbig2dec before 0.18 has a heap-based buffer overflow.

Vulnerability class: Buffer Overflow

Published 2020-04-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.027 (85.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: +0.001

Affected products

Artifex Jbig2dec
Debian Linux — versions 9.0
openSUSE Leap — versions 15.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/ArtifexSoftware/jbig2dec/compare/0.17...0.18 (Third Party Advisory)
bugs.chromium.org/p/oss-fuzz/issues/detail (Exploit, Third Party Advisory)
github.com/ArtifexSoftware/jbig2dec/commit/0726320a4b55078e9d8deb590e477d598b3d… (Patch, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2020-05/msg00034.html (vendor-advisory, Mailing List, Third Party Advisory)
lists.debian.org/debian-lts-announce/2021/10/msg00023.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-12268?: CVE-2020-12268 is a critical-severity vulnerability in Artifex Jbig2dec, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-04-27.
How severe is CVE-2020-12268?: Critical severity. CVSS v3 base score is 9.8 out of 10.