CVE-2021-38171 · cross-distro fix matrix

CVE-2021-38171: adts_decode_extradata in libavformat/adtsenc.c in FFmpeg 4.4 does not check the init_get_bits return value, which is a necessary step because the second argument to init_get_bits can be crafted.

Affects 8 Linux releases across 12 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-38171 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

ffmpeg→ fixed in7:4.3.3-0+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ffmpeg
```

Debian bookworm

Source: Debian Security Tracker

ffmpeg→ fixed in7:4.4.1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ffmpeg
```

Debian trixie

Source: Debian Security Tracker

ffmpeg→ fixed in7:4.4.1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ffmpeg
```

Alpine v3.20

Source: Alpine secdb

ffmpeg→ fixed in4.4.1-r0
```
apk update && apk add --upgrade ffmpeg
```
ffmpeg4→ fixed in4.4.1-r0
```
apk update && apk add --upgrade ffmpeg4
```

Alpine v3.21

Source: Alpine secdb

ffmpeg→ fixed in4.4.1-r0
```
apk update && apk add --upgrade ffmpeg
```
ffmpeg4→ fixed in4.4.1-r0
```
apk update && apk add --upgrade ffmpeg4
```

Alpine edge

Source: Alpine secdb

ffmpeg→ fixed in4.4.1-r0
```
apk update && apk add --upgrade ffmpeg
```

Alpine v3.18

Source: Alpine secdb

ffmpeg→ fixed in4.4.1-r0
```
apk update && apk add --upgrade ffmpeg
```
ffmpeg4→ fixed in4.4.1-r0
```
apk update && apk add --upgrade ffmpeg4
```

Alpine v3.19

Source: Alpine secdb

ffmpeg→ fixed in4.4.1-r0
```
apk update && apk add --upgrade ffmpeg
```
ffmpeg4→ fixed in4.4.1-r0
```
apk update && apk add --upgrade ffmpeg4
```

Are YOU affected by CVE-2021-38171?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

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