CVE-2020-35964
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of...
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of incorrect extradata packing.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- 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
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of incorrect extradata packing.
- Record
CVE-2020-35964- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/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-787
- Updated
- 2026-11-02
CVE List No score
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of incorrect extradata packing.
- Record
CVE-2020-35964- Updated
- 2026-11-02
EUVDEUVD-2020-23547 No score
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of incorrect extradata packing.
- Record
EUVD-2020-23547- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rhcr-x3w4-7v5m
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of...
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of incorrect extradata packing.
- Record
GHSA-rhcr-x3w4-7v5m- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
OSVALPINE-CVE-2020-35964
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of incorrect extradata packing.
- Record
ALPINE-CVE-2020-35964- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
OSV
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of incorrect extradata packing.
- Record
CVE-2020-35964- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Show 5 moreShow less
OSVDEBIAN-CVE-2020-35964
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of incorrect extradata packing.
- Record
DEBIAN-CVE-2020-35964- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVJLSEC-2025-110
`track_header` in `libavformat/vividas.c` in FFmpeg 4.3.1 has an out-of-bounds write because of...
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of incorrect extradata packing.
- Record
JLSEC-2025-110- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/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 - Updated
- 2026-11-02
OSVOESA-2022-1808
ffmpeg security update
FFmpeg is a complete and free Internet live audio and video broadcasting solution for Linux/Unix. It also includes a digital VCR. It can encode in real time in many formats including MPEG1 audio and video, MPEG4, h263, ac3, asf, avi, real, mjpeg, and flash.
Security Fix(es):
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of incorrect extradata packing.(CVE-2020-35964)
libavcodec/dnxhddec.c in FFmpeg 4.4 does not check the return value of the init_vlc function, a similar issue to CVE-2013-0868.(CVE-2021-38114)
- Record
OESA-2022-1808- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-35964
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of incorrect extradata packing.
- Record
UBUNTU-CVE-2020-35964- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10754-1 No score
ffmpeg-4-4.4-5.2 on GA media
These are all security issues fixed in the ffmpeg-4-4.4-5.2 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10754-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
ffmpegAlpine:v3.13 |
before 4.3.3-r0 | 4.3.3-r0 |
ffmpegAlpine:v3.14 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpegAlpine:v3.15 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpegAlpine:v3.16 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpegAlpine:v3.17 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpegAlpine:v3.18 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpegAlpine:v3.19 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpegAlpine:v3.20 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpegAlpine:v3.21 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpegAlpine:v3.22 |
before 4.3.2-r0 | 4.3.2-r0 |
Show 19 moreShow less
| Package | Affected | Fixed |
|---|---|---|
ffmpegAlpine:v3.23 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpegAlpine:v3.24 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpeg4Alpine:v3.16 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpeg4Alpine:v3.17 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpeg4Alpine:v3.18 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpeg4Alpine:v3.19 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpeg4Alpine:v3.20 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpeg4Alpine:v3.21 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpeg4Alpine:v3.22 |
before 4.3.2-r0 | 4.3.2-r0 |
ffmpegDebian:12 |
before 7:4.3.1-6 | 7:4.3.1-6 |
ffmpegDebian:13 |
before 7:4.3.1-6 | 7:4.3.1-6 |
ffmpegDebian:14 |
before 7:4.3.1-6 | 7:4.3.1-6 |
FFMPEG_jllJulia |
4.3.1+2 up to 4.4.0+0 | 4.4.0+0 |
FFplay_jllJulia |
before 4.4.4+0 | 4.4.4+0 |
ffmpegopenEuler:20.03-LTS-SP1 |
before 4.2.4-4.oe1 | 4.2.4-4.oe1 |
ffmpegopenEuler:20.03-LTS-SP3 |
before 4.2.4-4.oe1 | 4.2.4-4.oe1 |
ffmpegopenEuler:22.03-LTS |
before 4.2.4-4.oe2203 | 4.2.4-4.oe2203 |
ffmpegUbuntu:20.04:LTS |
before 7:4.2.7-0ubuntu0.1, plus listed versions 7:4.1.4-1build27:4.2.1-27:4.2.1-2ubuntu17:4.2.2-1build17:4.2.2-1ubuntu17:4.2.4-1ubuntu0.1 |
7:4.2.7-0ubuntu0.1 |
ffmpeg-4openSUSE:Tumbleweed |
before 4.4-5.2 | 4.4-5.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| 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-2020-35964 is a medium vulnerability (CVSS 6.5) in Ffmpeg, published January 3, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.54%, the 75th percentile. Fixed in ffmpeg 4.3.3-r0.
References
github.com/FFmpeg/FFmpeg/commit/27a99e2c7d450fef15594671eef4465c8a166bd7
bugs.chromium.org/p/oss-fuzz/issues/detail?id=26622
security.gentoo.org/glsa/202105-24
nvd.nist.gov/vuln/detail/CVE-2020-35964
security.alpinelinux.org/vuln/CVE-2020-35964
Show 51 moreShow less
security-tracker.debian.org/tracker/CVE-2020-35964
openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1808
ubuntu.com/security/CVE-2020-35964
cve.org/CVERecord?id=CVE-2020-35964
suse.com/security/cve/CVE-2015-8216