What is CVE-2019-20909?

CVE-2019-20909 is a high-severity vulnerability in GNU Libredwg, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2020-07-16.

How severe is CVE-2019-20909?

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

NULL pointer dereference in GNU Libredwg

CVE-2019-20909

An issue was discovered in GNU LibreDWG through 0.9.3. There is a NULL pointer dereference in the function dwg_encode_LWPOLYLINE in dwg.spec.

Published 2020-07-16 · 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: 0.016 (75.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

GNU Libredwg

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

github.com/LibreDWG/libredwg/issues/178 (Exploit, Third Party Advisory)
github.com/LibreDWG/libredwg/commit/d7913b893bfa98fab27f05825dc4cab2d3a20c83 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-20909?: CVE-2019-20909 is a high-severity vulnerability in GNU Libredwg, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2020-07-16.
How severe is CVE-2019-20909?: High severity. CVSS v3 base score is 7.5 out of 10.