What is CVE-2018-20543?

CVE-2018-20543 is a medium-severity vulnerability in Libxsmm Project, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2018-12-28.

How severe is CVE-2018-20543?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Libxsmm Project

CVE-2018-20543

There is an attempted excessive memory allocation at libxsmm_sparse_csc_reader in generator_spgemm_csc_reader.c in LIBXSMM 1.10 that will cause a denial of service.

Vulnerability class: DoS (Denial of Service)

Published 2018-12-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Libxsmm Project — versions 1.10

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

bugzilla.redhat.com/show_bug.cgi (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2018-20543?: CVE-2018-20543 is a medium-severity vulnerability in Libxsmm Project, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2018-12-28.
How severe is CVE-2018-20543?: Medium severity. CVSS v3 base score is 6.5 out of 10.