CVE-2017-7809 · cross-distro fix matrix

CVE-2017-7809: A use-after-free vulnerability can occur when an editor DOM node is deleted prematurely during tree traversal while still bound to the document. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

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

Fix per ecosystem

Each block below is a distro release where CVE-2017-7809 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

firefox-esr→ fixed in52.3.0esr-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y firefox-esr
```

Debian bookworm

Source: Debian Security Tracker

firefox-esr→ fixed in52.3.0esr-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y firefox-esr
```

Debian trixie

Source: Debian Security Tracker

firefox-esr→ fixed in52.3.0esr-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y firefox-esr
```

Are YOU affected by CVE-2017-7809?

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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