CVE-2023-51764 · cross-distro fix matrix

CVE-2023-51764: Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipelining and smtpd_discard_ehlo_keywords=chunking (or certain other options that exist in recent versions). Remote attackers can use a published exploitation technique to inject e-mail messages

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

Fix per ecosystem

Each block below is a distro release where CVE-2023-51764 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

postfix→ fixed in3.5.23-0+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y postfix
```

Debian bookworm

Source: Debian Security Tracker

postfix→ fixed in3.7.9-0+deb12u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y postfix
```

Debian trixie

Source: Debian Security Tracker

postfix→ fixed in3.8.4-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y postfix
```

Are YOU affected by CVE-2023-51764?

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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