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CVE-2021-30474

31
FAUCET Score

CVE-2021-30474 is a critical use-after-free vulnerability in libaom, affecting AOMedia versions prior to 2021-03-30. This flaw, residing in aom_dsp/grain_table.c, carries a CVSS score of 9.8, indicating a severe impact with potential for complete compromise of confidentiality, integrity, and availability. It can be exploited remotely over the network with low attack complexity and no user interaction required. While there is no evidence of active exploitation, public exploit code, or inclusion in the KEV catalog, the vulnerability has garnered significant community discussion, suggesting awareness among researchers.

Impacted Technologies

VendorProductVersion(s)CPE
< 2021-03-30CPE matchmatch criteria
cpe:2.3:a:aomedia:aomedia:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.88%
Probability of exploitation in next 30 days
EPSS Percentile
77.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0188 is in the 66th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

aomedia.googlesource.com / aom/+/6e31957b6dc62dbc7d1bb70cd84902dd14c4bf2e
PatchThird Party Advisory
bugs.chromium.org / p/aomedia/issues/detail
Permissions RequiredThird Party Advisory
lists.debian.org / debian-lts-announce/2023/09/msg00003.html
security.gentoo.org / glsa/202401-32
debian.org / security/2023/dsa-5490