CVE-2021-44731 · cross-distro fix matrix

CVE-2021-44731: A race condition existed in the snapd 2.54.2 snap-confine binary when preparing a private mount namespace for a snap. This could allow a local attacker to gain root privileges by bind-mounting their own contents inside the snap's private mount namespace and causing snap-confine to execute arbitrary

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-44731 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

snapd→ fixed in2.49-1+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y snapd
```

Debian bookworm

Source: Debian Security Tracker

snapd→ fixed in2.54.3-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y snapd
```

Debian trixie

Source: Debian Security Tracker

snapd→ fixed in2.54.3-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y snapd
```

Are YOU affected by CVE-2021-44731?

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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