Vulnerability DatabaseCVE-2021-38171
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CVE-2021-38171
Published:August 21, 2021
Updated:May 17, 2026
adts_decode_extradata in libavformat/adtsenc.c in FFmpeg 4.4 does not check the init_get_bits return value, which is a necessary step because the second argument to init_get_bits can be crafted.
Related Resources (10)
https://github.com/FFmpeg/FFmpeg/commit/9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6
https://security.alpinelinux.org/vuln/CVE-2021-38171
https://www.debian.org/security/2021/dsa-4990
https://patchwork.ffmpeg.org/project/ffmpeg/patch/AS8P193MB12542A86E22F8207EC971930B6F19@AS8P193MB1254.EURP193.PROD.OUTLOOK.COM/
https://patchwork.ffmpeg.org/project/ffmpeg/patch/AS8P193MB12542A86E22F8207EC971930B6F19%40AS8P193MB1254.EURP193.PROD.OUTLOOK.COM/
https://security-tracker.debian.org/tracker/CVE-2021-38171
https://www.debian.org/security/2021/dsa-4998
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-38171
https://lists.debian.org/debian-lts-announce/2021/11/msg00012.html
https://security.gentoo.org/glsa/202312-14
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CVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Unchecked Return Value
CWE-252
EPSS
Base Score:
0.21