An issue was discovered in faad2 through 2.10.0.

published 2021-09-20 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-19133

cvss: 7.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 69%
public exploits: 0; none known

An issue was discovered in faad2 through 2.10.0. A heap-buffer-overflow exists in the function lt_prediction located in lt_predict.c. It allows an attacker to cause code Execution.

Patch / fix

distros 4

debian ubuntu alpine arch linux

faad2 Debian 14, Debian 13, Debian 12 2.10.0-1

debian advisories DEBIAN-CVE-2021-32278

faad2 Ubuntu 20.04 LTS 2.9.1-1ubuntu0.1
faad2 Ubuntu Pro 14.04 LTS 2.7-8+deb8u3ubuntu0.1~esm1
faad2 Ubuntu Pro 16.04 LTS 2.8.0~cvs20150510-1ubuntu0.1+esm1
faad2 Ubuntu Pro 18.04 LTS 2.8.8-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2021-32278

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

faad2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +6 more 2.10.1-r0

alpine advisories ALPINE-CVE-2021-32278

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

faad2 Arch Linux 2.10.0-1

arch linux advisories AVG-2403

Exploit prediction

1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/knik0/faad2/issues/62 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.8	CVSS:3.1/AV:L/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-787 Out-of-bounds Write

References

github.com /knik0/faad2/issues/62
exploit, issue-tracking, third-party-advisory
debian.org /security/2022/dsa-5109
vendor-advisory, third-party-advisory
lists.debian.org /debian-lts-announce/2021/10/msg00020.html
mailing-list, third-party-advisory

Sources

CVE List CVE-2021-32278
NVD CVE-2021-32278

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