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CVE-2021-30475

30
FAUCET Score

CVE-2021-30475 describes a critical buffer overflow vulnerability in the libaom library, specifically within aom_dsp/noise_model.c, affecting AOMedia and Fedora products prior to March 24, 2021. With a CVSS score of 9.8, this vulnerability is remotely exploitable without user interaction and could lead to complete compromise of confidentiality, integrity, and availability. While no public exploits, Metasploit modules, or Nuclei templates are currently available, and there is minimal community discussion or media coverage, its high severity warrants immediate patching.

Impacted Technologies

VendorProductVersion(s)CPE
< 2021-03-24CPE matchmatch criteria
cpe:2.3:a:aomedia:aomedia:*:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

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
2.22%
Probability of exploitation in next 30 days
EPSS Percentile
80.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0222 is in the 70th 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/+/12adc723acf02633595a4d8da8345742729f46c0
PatchThird Party Advisory
bugs.chromium.org / p/aomedia/issues/detail
Permissions RequiredThird Party Advisory
lists.debian.org / debian-lts-announce/2023/09/msg00003.html
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/ZXCI33HXH6YSOGC2LPE2REQLMIDH6US4
security.gentoo.org / glsa/202401-32
debian.org / security/2023/dsa-5490