CVE-2021-36978 · cross-distro fix matrix

CVE-2021-36978: QPDF 9.x through 9.1.1 and 10.x through 10.0.4 has a heap-based buffer overflow in Pl_ASCII85Decoder::write (called from Pl_AES_PDF::flush and Pl_AES_PDF::finish) when a certain downstream write fails.

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-36978 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

qpdf→ fixed in10.1.0-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y qpdf
```

Debian bookworm

Source: Debian Security Tracker

qpdf→ fixed in10.1.0-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y qpdf
```

Debian trixie

Source: Debian Security Tracker

qpdf→ fixed in10.1.0-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y qpdf
```

Are YOU affected by CVE-2021-36978?

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

Form-based quickscan View on NVD

Continuous monitoring beats manual checking

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