CVE-2026-40199 · cross-distro fix matrix

CVE-2026-40199: Dave Rolsky discovered that Net::CIDR::Lite did not properly handle

Affects 11 Linux releases across 11 (distro × package) combinations. First disclosed: 2026-06-08.

Fix per ecosystem

Each block below is a distro release where CVE-2026-40199 has a known fix. Run the listed command on that distro to remediate.

Ubuntu bionic

Source: Ubuntu USN

libnet-cidr-lite-perl→ fixed in0.21-1ubuntu0.18.04.1~esm1USN-8406-1
```
sudo apt-get install --only-upgrade -y libnet-cidr-lite-perl
```

Ubuntu focal

Source: Ubuntu USN

libnet-cidr-lite-perl→ fixed in0.21-2ubuntu0.1+esm1USN-8406-1
```
sudo apt-get install --only-upgrade -y libnet-cidr-lite-perl
```

Ubuntu jammy

Source: Ubuntu USN

libnet-cidr-lite-perl→ fixed in0.22-1ubuntu0.1USN-8406-1

sudo apt-get install --only-upgrade -y libnet-cidr-lite-perl

Ubuntu noble

Source: Ubuntu USN

libnet-cidr-lite-perl→ fixed in0.22-2ubuntu0.24.04.1USN-8406-1
```
sudo apt-get install --only-upgrade -y libnet-cidr-lite-perl
```

Ubuntu questing

Source: Ubuntu USN

libnet-cidr-lite-perl→ fixed in0.22-2ubuntu0.25.10.1USN-8406-1
```
sudo apt-get install --only-upgrade -y libnet-cidr-lite-perl
```

Ubuntu resolute

Source: Ubuntu USN

libnet-cidr-lite-perl→ fixed in0.22-2ubuntu0.26.04.1USN-8406-1
```
sudo apt-get install --only-upgrade -y libnet-cidr-lite-perl
```

Ubuntu xenial

Source: Ubuntu USN

libnet-cidr-lite-perl→ fixed in0.21-1ubuntu0.16.04.1~esm1USN-8406-1
```
sudo apt-get install --only-upgrade -y libnet-cidr-lite-perl
```

Debian bookworm

Source: Debian Security Tracker

libnet-cidr-lite-perl→ fixed in0.22-3~deb12u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libnet-cidr-lite-perl
```

Debian trixie

Source: Debian Security Tracker

libnet-cidr-lite-perl→ fixed in0.22-3~deb13u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libnet-cidr-lite-perl
```

Alpine v3.21

Source: Alpine secdb

perl-net-cidr-lite→ fixed in0.23-r0

apk update && apk add --upgrade perl-net-cidr-lite

Alpine edge

Source: Alpine secdb

perl-net-cidr-lite→ fixed in0.23-r0

apk update && apk add --upgrade perl-net-cidr-lite

Are YOU affected by CVE-2026-40199?

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

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