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Fencer Vulns
critical 9.8

CVE-2021-30473 json

aom_image.c in libaom in AOMedia before 2021-04-07 frees memory that is not located on the heap.

published 2021-05-06 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-17396

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

aom_image.c in libaom in AOMedia before 2021-04-07 frees memory that is not located on the heap.

Patch / fix

  • aomedia aomedia 2021-04-07
  • aom Debian 14, Debian 13, Debian 12 3.2.0-1

debian advisories DEBIAN-CVE-2021-30473

  • aom Ubuntu 20.04 LTS 1.0.0.errata1-3+deb11u1build0.20.04.1

ubuntu advisories UBUNTU-CVE-2021-30473

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libaom SLE Real Time 15 SP2, SLE Module for Desktop Applications 15 SP3, openSUSE Leap 15.4 +1 more 1.0.0-150200.3.12.1

suse advisories SUSE-SU-2022:1436-1

  • aom Alpine 3.24, Alpine 3.23, Alpine 3.22 +7 more 3.1.1-r0

alpine advisories ALPINE-CVE-2021-30473

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • aom Arch Linux 3.1.0-1

arch linux advisories AVG-1925

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-30473 updated cvss 9.8

libaom: aom_image.c in libaom frees memory that is not located on the heap

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.05% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-763 Release of Invalid Pointer or Reference

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.