CVE-2026-12490 · cross-distro fix matrix

CVE-2026-12490: It was discovered that NSD incorrectly handled APL resource records with an

Affects 6 Linux releases across 7 (distro × package) combinations. First disclosed: 2026-06-25.

Fix per ecosystem

Each block below is a distro release where CVE-2026-12490 has a known fix. Run the listed command on that distro to remediate.

Ubuntu bionic

Source: Ubuntu USN

nsd→ fixed in4.1.17-1ubuntu0.1~esm1USN-8474-1
```
sudo apt-get install --only-upgrade -y nsd
```

Ubuntu focal

Source: Ubuntu USN

nsd→ fixed in4.1.26-1ubuntu0.1~esm1USN-8474-1
```
sudo apt-get install --only-upgrade -y nsd
```

Ubuntu jammy

Source: Ubuntu USN

nsd→ fixed in4.3.9-1ubuntu0.1~esm1USN-8474-1
```
sudo apt-get install --only-upgrade -y nsd
```

Ubuntu noble

Source: Ubuntu USN

nsd→ fixed in4.8.0-1ubuntu0.1~esm1USN-8474-1
```
sudo apt-get install --only-upgrade -y nsd
```

Ubuntu resolute

Source: Ubuntu USN

nsd→ fixed in4.14.0-1ubuntu0.1~esm1USN-8474-1
```
sudo apt-get install --only-upgrade -y nsd
```

Ubuntu xenial

Source: Ubuntu USN

nsd→ fixed in4.1.7-1ubuntu0.1~esm1USN-8474-1
```
sudo apt-get install --only-upgrade -y nsd
```
nsd3→ fixed in4.1.7-1ubuntu0.1~esm1USN-8474-1
```
sudo apt-get install --only-upgrade -y nsd3
```

Are YOU affected by CVE-2026-12490?

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

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