CVE-2020-13943 · cross-distro fix matrix

CVE-2020-13943: If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible that a subsequent request made on that connection could conta

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

Fix per ecosystem

Each block below is a distro release where CVE-2020-13943 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

tomcat9→ fixed in9.0.38-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y tomcat9
```

Debian bookworm

Source: Debian Security Tracker

tomcat9→ fixed in9.0.38-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y tomcat9
```

Debian trixie

Source: Debian Security Tracker

tomcat9→ fixed in9.0.38-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y tomcat9
```

Are YOU affected by CVE-2020-13943?

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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