Description
In line libavcodec/h264dec.c:500 in libav(v13_dev0), ffmpeg(n3.4), chromium(56 prior Feb 13, 2017), the return value of init_get_bits is ignored and get_ue_golomb(&gb) is called on an uninitialized get_bits context, which causes a NULL deref exception.
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 | 7:3.1.1-1 | — |
| Debian 13 | ffmpeg | 7:3.1.1-1 | — |
| Debian 12 | ffmpeg | 7:3.1.1-1 | — |
| Debian 8 | libav | 6:11.12-1~deb8u6 | DLA-1740-1 |
Advisories 1
- DLA-1740-1 libav - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://lists.ffmpeg.org/pipermail/ffmpeg-cvslog/2017-January/104221.html
- https://bugzilla.libav.org/show_bug.cgi?id=952
- https://chromium.googlesource.com/chromium/third_party/ffmpeg/+/8e313ca08800178efce00045e07dc494d437b70c
- [debian-lts-announce] 20190330 [SECURITY] [DLA 1740-1] libav security update mailing-list