What is CVE-2021-30474?

CVE-2021-30474 is a critical-severity vulnerability in Aomedia, classified under Use After Free. CVSS score: 9.8/10. Published 2021-06-02.

How severe is CVE-2021-30474?

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

Use After Free in Aomedia

CVE-2021-30474

aom_dsp/grain_table.c in libaom in AOMedia before 2021-03-30 has a use-after-free.

Vulnerability class: Use-After-Free

Published 2021-06-02 · 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: 0.019 (78.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Aomedia

Weakness classification (CWE)

CWE-416 — Use After Free

References

bugs.chromium.org/p/aomedia/issues/detail (Permissions Required, Third Party Advisory)
aomedia.googlesource.com/aom/+/6e31957b6dc62dbc7d1bb70cd84902dd14c4bf2e (Patch, Third Party 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-2021-30474?: CVE-2021-30474 is a critical-severity vulnerability in Aomedia, classified under Use After Free. CVSS score: 9.8/10. Published 2021-06-02.
How severe is CVE-2021-30474?: Critical severity. CVSS v3 base score is 9.8 out of 10.