CVE-2025-59028 · cross-distro fix matrix

CVE-2025-59028: When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active authentication sessions to fail. Invalid BASE64 data can be used to DoS a vulnerable server to break concurrent logins. Install fixed version or disable concurrency in login processes (heavy

Affects 2 Linux releases across 2 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2025-59028 has a known fix. Run the listed command on that distro to remediate.

Debian trixie

Source: Debian Security Tracker

dovecot→ fixed in1:2.4.1+dfsg1-6+deb13u4urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y dovecot
```

Alpine edge

Source: Alpine secdb

dovecot→ fixed in2.4.3-r0
```
apk update && apk add --upgrade dovecot
```

Are YOU affected by CVE-2025-59028?

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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