How severe is CVE-2021-34184?

CVE-2021-34184 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-34184 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34184?

CVE-2021-34184 affects Mackron Miniaudio. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34184?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-34184 published?

CVE-2021-34184 was published on 2021-06-25 and last updated on 2026-06-17.

CVE-2021-34184

CVE-2021-34184 is a critical-severity vulnerability in Mackron Miniaudio with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-415.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-415
Affected product: Mackron Miniaudio
Published: 2021-06-25
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is 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.
How severe is CVE-2021-34184?: CVE-2021-34184 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-34184 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34184?: CVE-2021-34184 affects Mackron Miniaudio. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34184?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-34184 published?: CVE-2021-34184 was published on 2021-06-25 and last updated on 2026-06-17.

References

https://github.com/mackron/miniaudio/issues/319

Affected products (1)

cpe:2.3:a:mackron:miniaudio:0.10.35:*:*:*:*:*:*:*

More vulnerabilities in Mackron Miniaudio

CVE-2021-34185 — High (CVSS 7.8): Miniaudio 0.10.35 has an integer-based buffer overflow caused by an out-of-bounds left shift in drwav_bytes_to_u32 in…
CVE-2024-41147 — High (CVSS 7.7): An out-of-bounds write vulnerability exists in the ma_dr_flac__decode_samples__lpc functionality of Miniaudio miniaudio…
CVE-2026-32837 — Medium (CVSS 4.0): miniaudio version 0.11.25 and earlier (fixed in commits 1df46ae and 1df46ae) contain a heap out-of-bounds read…

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