Description
The ff_dwt_decode function in libavcodec/jpeg2000dwt.c in FFmpeg before 2.8.4 does not validate the number of decomposition levels before proceeding with Discrete Wavelet Transform decoding, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via crafted JPEG 2000 data.
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 | 7:2.8.4-1 | — |
| Debian 13 | ffmpeg | 7:2.8.4-1 | — |
| Debian 12 | ffmpeg | 7:2.8.4-1 | — |
| Debian 8 | libav | 6:11.12-1~deb8u2 | DLA-1611-1 |
Advisories 1
- DLA-1611-1 libav - security update Debian Security (DSA / DLA) · Mar 9, 2026