CVE-2026-2447 · cross-distro fix matrix

CVE-2026-2447: Heap buffer overflow in libvpx. This vulnerability was fixed in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2.

Affects 3 Linux releases across 9 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2026-2447 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

firefox-esr→ fixed in140.8.0esr-1urgency: unimportant
```
sudo apt-get install --only-upgrade -y firefox-esr
```
libvpx→ fixed in1.9.0-1+deb11u5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libvpx
```
thunderbird→ fixed in1:140.8.0esr-1urgency: unimportant
```
sudo apt-get install --only-upgrade -y thunderbird
```

Debian bookworm

Source: Debian Security Tracker

firefox-esr→ fixed in140.8.0esr-1urgency: unimportant
```
sudo apt-get install --only-upgrade -y firefox-esr
```
libvpx→ fixed in1.12.0-1+deb12u5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libvpx
```
thunderbird→ fixed in1:140.8.0esr-1urgency: unimportant
```
sudo apt-get install --only-upgrade -y thunderbird
```

Debian trixie

Source: Debian Security Tracker

firefox-esr→ fixed in140.8.0esr-1urgency: unimportant
```
sudo apt-get install --only-upgrade -y firefox-esr
```
libvpx→ fixed in1.15.0-2.1+deb13u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libvpx
```
thunderbird→ fixed in1:140.8.0esr-1urgency: unimportant
```
sudo apt-get install --only-upgrade -y thunderbird
```

Are YOU affected by CVE-2026-2447?

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

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