What is CVE-2023-37365?

CVE-2023-37365 is a medium-severity vulnerability in Hnswlib Project, classified under Double Free. CVSS score: 6.5/10. Published 2023-06-30.

How severe is CVE-2023-37365?

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

Double Free in Hnswlib Project

CVE-2023-37365

Hnswlib 0.7.0 has a double free in init_index when the M argument is a large integer.

Vulnerability class: Double Free

Published 2023-06-30 · 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: 0.006 (46.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Hnswlib Project — versions 0.7.0

Weakness classification (CWE)

CWE-415 — Double Free

References

github.com/nmslib/hnswlib/issues/467 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2023-37365?: CVE-2023-37365 is a medium-severity vulnerability in Hnswlib Project, classified under Double Free. CVSS score: 6.5/10. Published 2023-06-30.
How severe is CVE-2023-37365?: Medium severity. CVSS v3 base score is 6.5 out of 10.