CVE-2020-35680 · cross-distro fix matrix

CVE-2020-35680: smtpd/lka_filter.c in OpenSMTPD before 6.8.0p1, in certain configurations, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted pattern of client activity, because the filter state machine does not properly maintain the I/O channel between th

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

Fix per ecosystem

Each block below is a distro release where CVE-2020-35680 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

opensmtpd→ fixed in6.8.0p2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y opensmtpd
```

Debian bookworm

Source: Debian Security Tracker

opensmtpd→ fixed in6.8.0p2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y opensmtpd
```

Debian trixie

Source: Debian Security Tracker

opensmtpd→ fixed in6.8.0p2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y opensmtpd
```

Are YOU affected by CVE-2020-35680?

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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