AOM v2.0.1 was discovered to contain a global buffer overflow via the component av1/encoder/partition_search.h.

published 2021-12-02 4 y ago modified 2026-06-17 4 mo ago also EUVD-2020-23711

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

Patch / fix

distros 2

debian ubuntu

aom Debian 14, Debian 13, Debian 12 3.2.0-1

debian advisories DEBIAN-CVE-2020-36133

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

ubuntu advisories UBUNTU-CVE-2020-36133

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

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-2020-36133 updated 2025-11-21 cvss 8.8

aom: global buffer overflow in av1/encoder/partition_search.h

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

1.77% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

bugs.chromium.org https://bugs.chromium.org/p/aomedia/issues/detail?id=2913&q=&can=1 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input

References

bugs.chromium.org /p/aomedia/issues/detail?id=2913&q=&can=1
exploit, third-party-advisory
debian.org /security/2023/dsa-5490
vendor-advisory
security.gentoo.org /glsa/202401-32
vendor-advisory
lists.debian.org /debian-lts-announce/2023/09/msg00003.html
mailing-list

Sources

CVE List CVE-2020-36133
NVD CVE-2020-36133

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.

Summary