CVE-2016-9821
Integer overflow in libavcodec/mpegvideo_parser.c in libav 11.8 allows remote attackers to cause...
Integer overflow in libavcodec/mpegvideo_parser.c in libav 11.8 allows remote attackers to cause a denial of service (crash) via a crafted file.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Integer overflow in libavcodec/mpegvideo_parser.c in libav 11.8 allows remote attackers to cause a denial of service (crash) via a crafted file.
- Record
CVE-2016-9821- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-190
- Updated
- 2026-11-02
CVE List No score
Integer overflow in libavcodec/mpegvideo_parser.c in libav 11.8 allows remote attackers to cause a denial of service (crash) via a crafted file.
- Record
CVE-2016-9821- Updated
- 2026-11-02
EUVDEUVD-2016-10621 No score
Integer overflow in libavcodec/mpegvideo_parser.c in libav 11.8 allows remote attackers to cause a denial of service (crash) via a crafted file.
- Record
EUVD-2016-10621- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-m38w-pvpf-h3pf
Integer overflow in libavcodec/mpegvideo_parser.c in libav 11.8 allows remote attackers to cause...
Integer overflow in libavcodec/mpegvideo_parser.c in libav 11.8 allows remote attackers to cause a denial of service (crash) via a crafted file.
- Record
GHSA-m38w-pvpf-h3pf- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-190
- Updated
- 2026-11-02
OSV
Integer overflow in libavcodec/mpegvideo_parser.c in libav 11.8 allows remote attackers to cause a denial of service (crash) via a crafted file.
- Record
CVE-2016-9821- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2016-9821
Integer overflow in libavcodec/mpegvideo_parser.c in libav 11.8 allows remote attackers to cause a denial of service (crash) via a crafted file.
- Record
UBUNTU-CVE-2016-9821- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libavDebian:7 |
before 6:0.8.20-0+deb7u1, plus listed versions 6:0.8.10-16:0.8.12-16:0.8.13-16:0.8.15-16:0.8.16-1 Show 10 moreShow less6:0.8.17-16:0.8.17-26:0.8.17-2+deb7u16:0.8.17-2+deb7u26:0.8.18-0+deb7u16:0.8.19-0+deb7u16:0.8.6-16:0.8.7-16:0.8.8-16:0.8.9-1 |
6:0.8.20-0+deb7u1 |
libavDebian:8 |
before 6:11.9-1~deb8u1, plus listed versions 6:11.3-16:11.3-1+deb8u16:11.3-26:11.3-36:11.4-1 Show 6 moreShow less6:11.4-1~deb8u16:11.4-26:11.4-2+x32.16:11.6-1~deb8u16:11.7-1~deb8u16:11.8-1~deb8u1 |
6:11.9-1~deb8u1 |
libavUbuntu:Pro:14.04:LTS |
before 6:9.20-0ubuntu0.14.04.1+esm1, plus listed versions 6:0.8.7-1ubuntu26:9.10-1ubuntu16:9.10-1ubuntu26:9.10-1ubuntu56:9.10-1ubuntu6 Show 8 moreShow less6:9.10-1ubuntu76:9.11-2ubuntu16:9.11-2ubuntu26:9.13-0ubuntu0.14.04.16:9.14-0ubuntu0.14.04.16:9.16-0ubuntu0.14.04.16:9.18-0ubuntu0.14.04.16:9.20-0ubuntu0.14.04.1 |
6:9.20-0ubuntu0.14.04.1+esm1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2016-9821 is a medium vulnerability (CVSS 5.5) in Libav, published January 19, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.23%, the 69th percentile. Fixed in libav 6:0.8.20-0+deb7u1.
References
securityfocus.com/bid/94732
debian.org/security/2017/dsa-3833
blogs.gentoo.org/ago/2016/12/01/libav-multiple-crashes-from-the-undefined-behavior-sanitizer
nvd.nist.gov/vuln/detail/CVE-2016-9821
github.com/advisories/GHSA-m38w-pvpf-h3pf
ubuntu.com/security/CVE-2016-9821
cve.org/CVERecord?id=CVE-2016-9821