What is CVE-2021-38383?

CVE-2021-38383 is a critical-severity vulnerability in Owntone Server, classified under Use After Free. CVSS score: 9.8/10. Published 2021-08-10.

How severe is CVE-2021-38383?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Use After Free in Owntone Server

CVE-2021-38383

OwnTone (aka owntone-server) through 28.1 has a use-after-free in net_bind() in misc.c.

Vulnerability class: Use-After-Free

Published 2021-08-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (67.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Owntone Server

Weakness classification (CWE)

CWE-416 — Use After Free

References

github.com/owntone/owntone-server/commit/246d8ae0cef27377e5dfe9ee3ad87e864d6b62… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-38383?: CVE-2021-38383 is a critical-severity vulnerability in Owntone Server, classified under Use After Free. CVSS score: 9.8/10. Published 2021-08-10.
How severe is CVE-2021-38383?: Critical severity. CVSS v3 base score is 9.8 out of 10.