CVE-2020-21896 · cross-distro fix matrix

CVE-2020-21896: A Use After Free vulnerability in svg_dev_text_span_as_paths_defs function in source/fitz/svg-device.c in Artifex Software MuPDF 1.16.0 allows remote attackers to cause a denial of service via opening of a crafted PDF file.

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2020-21896 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

mupdf→ fixed in1.17.0+ds1-2+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mupdf
```

Debian bookworm

Source: Debian Security Tracker

mupdf→ fixed in1.19.0+ds1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mupdf
```

Debian trixie

Source: Debian Security Tracker

mupdf→ fixed in1.19.0+ds1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mupdf
```

Are YOU affected by CVE-2020-21896?

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.

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