Description
Prior to ffmpeg version 4.3, the tty demuxer did not have a 'read_probe' function assigned to it. By crafting a legitimate "ffconcat" file that references an image, followed by a file the triggers the tty demuxer, the contents of the second file will be copied into the output file verbatim (as long as the `-vcodec copy` option is passed to ffmpeg).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | ffmpeg | ffmpeg 4.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | ffmpeg | 7:4.3-2 | — |
| Debian 13 | ffmpeg | 7:4.3-2 | — |
| Debian 12 | ffmpeg | 7:4.3-2 | — |
| Debian 10 | ffmpeg | 7:4.1.9-0+deb10u1 | DSA-5126-1 |
| Debian 9 | ffmpeg | 7:3.2.15-0+deb9u3 | DLA-2742-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | ffmpeg | 7:2.8.17-0ubuntu0.1+esm4 | USN-5167-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | ffmpeg | 3.4.2-11.17.1 | SUSE-SU-2021:3521-1 |
| SLES 15 SP2 | ffmpeg | 3.4.2-11.17.1 | SUSE-SU-2021:3521-1 |
| SLES 15 SP1 | ffmpeg | 3.4.2-150000.4.44.1 | SUSE-SU-2023:0005-1 |
| SLES 15 | ffmpeg | 3.4.2-150000.4.44.1 | SUSE-SU-2023:0005-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP1 | ffmpeg | 3.4.2-150000.4.44.1 | SUSE-SU-2023:0005-1 |
| SLES for SAP 15 | ffmpeg | 3.4.2-150000.4.44.1 | SUSE-SU-2023:0005-1 |
| SLE HPC 15 SP1 | ffmpeg | 3.4.2-150000.4.44.1 | SUSE-SU-2023:0005-1 |
| SLE HPC 15 | ffmpeg | 3.4.2-150000.4.44.1 | SUSE-SU-2023:0005-1 |
| SUSE Enterprise Storage 6 | ffmpeg | 3.4.2-150000.4.44.1 | SUSE-SU-2023:0005-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | ffmpeg | 3.4.2-11.17.1 | openSUSE-SU-2021:3521-1 |
Advisories 7
- USN-5167-1 ffmpeg vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-5126-1 ffmpeg - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2742-1 ffmpeg - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2021:3521-1 Security update for ffmpeg SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0005-1 Security update for ffmpeg SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3521-1 Security update for ffmpeg SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0010 ffmpeg: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Jan 2, 2023