What is CVE-2018-20337?

CVE-2018-20337 is a high-severity vulnerability in Libraw, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2018-12-21.

How severe is CVE-2018-20337?

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

Buffer overflow in Libraw

CVE-2018-20337

There is a stack-based buffer overflow in the parse_makernote function of dcraw_common.cpp in LibRaw 0.19.1. Crafted input will lead to a denial of service or possibly unspecified other impact.

Vulnerability class: Buffer Overflow

Published 2018-12-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.021 (80.7th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

Libraw — versions 0.19.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/LibRaw/LibRaw/issues/192 (Exploit, Patch, Third Party Advisory)
usn.ubuntu.com/3989-1/ (vendor-advisory)

Frequently asked questions

What is CVE-2018-20337?: CVE-2018-20337 is a high-severity vulnerability in Libraw, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2018-12-21.
How severe is CVE-2018-20337?: High severity. CVSS v3 base score is 8.8 out of 10.