What is CVE-2021-34184?

CVE-2021-34184 is a critical-severity vulnerability in Mackron Miniaudio, classified under Double Free. CVSS score: 9.8/10. Published 2021-06-25.

How severe is CVE-2021-34184?

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

Double Free in Mackron Miniaudio

CVE-2021-34184

Miniaudio 0.10.35 has a Double free vulnerability that could cause a buffer overflow in ma_default_vfs_close__stdio in miniaudio.h.

Vulnerability class: Double Free

Published 2021-06-25 · 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: 0.011 (65.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Mackron Miniaudio — versions 0.10.35

Weakness classification (CWE)

CWE-415 — Double Free

References

github.com/mackron/miniaudio/issues/319 (Exploit, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-34184?: CVE-2021-34184 is a critical-severity vulnerability in Mackron Miniaudio, classified under Double Free. CVSS score: 9.8/10. Published 2021-06-25.
How severe is CVE-2021-34184?: Critical severity. CVSS v3 base score is 9.8 out of 10.