What is CVE-2020-18395?

CVE-2020-18395 is a high-severity vulnerability in GNU Gama, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-05-28.

How severe is CVE-2020-18395?

High severity. CVSS v3 base score is 7.5 out of 10.

NULL pointer dereference in GNU Gama

CVE-2020-18395

A NULL-pointer deference issue was discovered in GNU_gama::set() in ellipsoid.h in Gama 2.04 which can lead to a denial of service (DOS) via segment faults caused by crafted inputs.

Published 2021-05-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.013 (68.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

GNU Gama — versions 2.04

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

lists.gnu.org/archive/html/bug-gama/2019-04/msg00001.html (Exploit, Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2020-18395?: CVE-2020-18395 is a high-severity vulnerability in GNU Gama, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-05-28.
How severe is CVE-2020-18395?: High severity. CVSS v3 base score is 7.5 out of 10.