What is CVE-2021-45950?

CVE-2021-45950 is a medium-severity vulnerability in GNU Libredwg, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2022-01-01.

How severe is CVE-2021-45950?

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

Buffer overflow in GNU Libredwg

CVE-2021-45950

LibreDWG 0.12.4.4313 through 0.12.4.4367 has an out-of-bounds write in dwg_free_BLOCK_private (called from dwg_free_BLOCK and dwg_free_object).

Vulnerability class: Buffer Overflow

Published 2022-01-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (57.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

GNU Libredwg

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/google/oss-fuzz-vulns/blob/main/vulns/libredwg/OSV-2021-814.yaml (Exploit, Third Party Advisory)
bugs.chromium.org/p/oss-fuzz/issues/detail (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-45950?: CVE-2021-45950 is a medium-severity vulnerability in GNU Libredwg, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2022-01-01.
How severe is CVE-2021-45950?: Medium severity. CVSS v3 base score is 6.5 out of 10.