What is CVE-2018-11498?

CVE-2018-11498 is a high-severity vulnerability in Lizard Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2018-05-26.

How severe is CVE-2018-11498?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Lizard Project

CVE-2018-11498

In Lizard v1.0 and LZ5 v2.0 (the prior release, before the product was renamed), there is an unchecked buffer size during a memcpy in the Lizard_decompress_LIZv1 function (lib/lizard_decompress_liz.h). Remote attackers can leverage this vulnerability to cause a denial of service via a crafted input file, as well as achieve remote code execution.

Vulnerability class: Buffer Overflow

Published 2018-05-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.020 (80.2th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

Lizard Project — versions 1.0
Lizard Project Lz5 — versions 2.0

Weakness classification (CWE)

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

References

github.com/inikep/lizard/issues/16 (Third Party Advisory)

Frequently asked questions

What is CVE-2018-11498?: CVE-2018-11498 is a high-severity vulnerability in Lizard Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2018-05-26.
How severe is CVE-2018-11498?: High severity. CVSS v3 base score is 7.8 out of 10.