CVE-2018-20199

Name: CVE-2018-20199
Creator: NVD / NIST
Published: 2018-12-18T01:29:00.47+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.13%

Last modified Jun 17, 2026

CVE-2018-20199 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A NULL pointer dereference was discovered in ifilter_bank of libfaad/filtbank.c in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8. The vulnerability causes a segmentation fault and application crash, which leads to denial of service because adding to windowed output is mishandled in the ONLY_LONG_SEQUENCE case.. EPSS estimates a 1.13% chance of exploitation in the next 30 days.

Description

A NULL pointer dereference was discovered in ifilter_bank of libfaad/filtbank.c in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8. The vulnerability causes a segmentation fault and application crash, which leads to denial of service because adding to windowed output is mishandled in the ONLY_LONG_SEQUENCE case.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

1.13%

62.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Audiocoding	Freeware Advanced Audio Decoder 2	< 2.9.0
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

https://github.com/knik0/faad2/issues/24Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00033.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00020.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/202006-17Third Party Advisory
https://www.debian.org/security/2022/dsa-5109Third Party Advisory
https://github.com/knik0/faad2/issues/24Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00033.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00020.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/202006-17Third Party Advisory
https://www.debian.org/security/2022/dsa-5109Third Party Advisory

Timeline

Published: Dec 18, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20199?

How severe is CVE-2018-20199?

CVE-2018-20199 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.13% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20199?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-20199?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST