Description
In libavformat/rmdec.c in FFmpeg 3.3.3, a DoS in ivr_read_header() due to lack of an EOF (End of File) check might cause huge CPU consumption. When a crafted IVR file, which claims a large "len" field in the header but does not contain sufficient backing data, is provided, the first type==4 loop would consume huge CPU resources, since there is no EOF check inside the loop.
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 | 7:3.3.4-1 | — |
| Debian 13 | ffmpeg | 7:3.3.4-1 | — |
| Debian 12 | ffmpeg | 7:3.3.4-1 | — |
| Debian 9 | ffmpeg | 7:3.2.8-1~deb9u1 | DSA-3996-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | ffmpeg-4 | 4.4-5.2 | openSUSE-SU-2024:10754-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | ffmpeg | 3.3.4-r0 | — |
| Alpine v3.23 | ffmpeg | 3.3.4-r0 | — |
| Alpine v3.22 | ffmpeg +1 | 3.3.4-r0 | — |
| Alpine v3.21 | ffmpeg +1 | 3.3.4-r0 | — |
| Alpine v3.20 | ffmpeg +1 | 3.3.4-r0 | — |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | ffmpeg +1 | 3.3.4-r0 | — |
| Alpine v3.18 | ffmpeg +1 | 3.3.4-r0 | — |
| Alpine v3.17 | ffmpeg +1 | 3.3.4-r0 | — |
| Alpine v3.16 | ffmpeg +1 | 3.3.4-r0 | — |
| Alpine v3.15 | ffmpeg | 3.3.4-r0 | — |
| Alpine v3.14 | ffmpeg | 3.3.4-r0 | — |
| Alpine v3.13 | ffmpeg | 3.3.4-r0 | — |
| Alpine v3.12 | ffmpeg | 3.3.4-r0 | — |
| Alpine v3.11 | ffmpeg | 3.3.4-r0 | — |
| Alpine v3.10 | ffmpeg | 3.3.4-r0 | — |
| Alpine v3.9 | ffmpeg | 3.3.4-r0 | — |
| Alpine v3.8 | ffmpeg | 3.3.4-r0 | — |
| Alpine v3.7 | ffmpeg | 3.3.4-r0 | — |
| Alpine v3.6 | ffmpeg | 3.2.8-r0 | — |
| Alpine v3.5 | ffmpeg | 3.1.11-r0 | — |
| Alpine v3.4 | ffmpeg | 3.1.11-r0 | — |
Advisories 2
- DSA-3996-1 ffmpeg - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10754-1 ffmpeg-4-4.4-5.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 100627 vdb-entry
- https://github.com/FFmpeg/FFmpeg/commit/124eb202e70678539544f6268efc98131f19fa49
- DSA-3996 vendor-advisory