What is CVE-2021-30475?

CVE-2021-30475 is a critical-severity vulnerability in Aomedia, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-06-04.

How severe is CVE-2021-30475?

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

Buffer overflow in Aomedia

CVE-2021-30475

aom_dsp/noise_model.c in libaom in AOMedia before 2021-03-24 has a buffer overflow.

Vulnerability class: Buffer Overflow

Published 2021-06-04 · 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: 0.022 (82.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000

Affected products

Aomedia
Fedoraproject Fedora — versions 34

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

bugs.chromium.org/p/aomedia/issues/detail (Permissions Required, Third Party Advisory)
aomedia.googlesource.com/aom/+/12adc723acf02633595a4d8da8345742729f46c0 (Patch, Third Party Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.debian.org/debian-lts-announce/2023/09/msg00003.html (mailing-list)
www.debian.org/security/2023/dsa-5490 (vendor-advisory)
security.gentoo.org/glsa/202401-32 (vendor-advisory)

Frequently asked questions

What is CVE-2021-30475?: CVE-2021-30475 is a critical-severity vulnerability in Aomedia, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-06-04.
How severe is CVE-2021-30475?: Critical severity. CVSS v3 base score is 9.8 out of 10.