CVE-2019-20056 · cross-distro fix matrix

CVE-2019-20056: stb_image.h (aka the stb image loader) 2.23, as used in libsixel and other products, has an assertion failure in stbi__shiftsigned.

Affects 3 Linux releases across 5 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2019-20056 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

libsixel→ fixed in1.8.6-1urgency: low

sudo apt-get install --only-upgrade -y libsixel

Debian bookworm

Source: Debian Security Tracker

libsixel→ fixed in1.8.6-1urgency: low

sudo apt-get install --only-upgrade -y libsixel

libstb→ fixed in0.0~git20220908.8b5f1f3+ds-1urgency: low
```
sudo apt-get install --only-upgrade -y libstb
```

Debian trixie

Source: Debian Security Tracker

libsixel→ fixed in1.8.6-1urgency: low

sudo apt-get install --only-upgrade -y libsixel

libstb→ fixed in0.0~git20220908.8b5f1f3+ds-1urgency: low
```
sudo apt-get install --only-upgrade -y libstb
```

Are YOU affected by CVE-2019-20056?

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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