CVE-2021-31523 · cross-distro fix matrix

CVE-2021-31523: The Debian xscreensaver 5.42+dfsg1-1 package for XScreenSaver has cap_net_raw enabled for the /usr/libexec/xscreensaver/sonar file, which allows local users to gain privileges because this is arguably incompatible with the design of the Mesa 3D Graphics library dependency.

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-31523 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

xscreensaver→ fixed in5.45+dfsg1-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xscreensaver
```

Debian bookworm

Source: Debian Security Tracker

xscreensaver→ fixed in5.45+dfsg1-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xscreensaver
```

Debian trixie

Source: Debian Security Tracker

xscreensaver→ fixed in5.45+dfsg1-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xscreensaver
```

Are YOU affected by CVE-2021-31523?

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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