CVE-2016-8858 · cross-distro fix matrix

CVE-2016-8858: The kex_input_kexinit function in kex.c in OpenSSH 6.x and 7.x through 7.3 allows remote attackers to cause a denial of service (memory consumption) by sending many duplicate KEXINIT requests. NOTE: a third party reports that "OpenSSH upstream does not consider this as a security issue."

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

Fix per ecosystem

Each block below is a distro release where CVE-2016-8858 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

openssh→ fixed in1:7.3p1-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openssh
```

Debian bookworm

Source: Debian Security Tracker

openssh→ fixed in1:7.3p1-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openssh
```

Debian trixie

Source: Debian Security Tracker

openssh→ fixed in1:7.3p1-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openssh
```

Are YOU affected by CVE-2016-8858?

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

CVE-2016-8858dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.

See StackPatch ($99 lifetime)