CVE-2026-28372 · cross-distro fix matrix

CVE-2026-28372: telnetd in GNU inetutils through 2.7 allows privilege escalation that can be exploited by abusing systemd service credentials support added to the login(1) implementation of util-linux in release 2.40. This is related to client control over the CREDENTIALS_DIRECTORY environment variable, and require

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

Fix per ecosystem

Each block below is a distro release where CVE-2026-28372 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

inetutils→ fixed in2:2.0-1+deb11u4urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y inetutils
```

Debian bookworm

Source: Debian Security Tracker

inetutils→ fixed in2:2.4-2+deb12u3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y inetutils
```

Debian trixie

Source: Debian Security Tracker

inetutils→ fixed in2:2.6-3+deb13u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y inetutils
```

Are YOU affected by CVE-2026-28372?

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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