CVE-2021-25737 · cross-distro fix matrix

CVE-2021-25737: A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-25737 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

kubernetes→ fixed in1.20.5+really1.20.2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y kubernetes
```

Debian bookworm

Source: Debian Security Tracker

kubernetes→ fixed in1.20.5+really1.20.2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y kubernetes
```

Debian trixie

Source: Debian Security Tracker

kubernetes→ fixed in1.20.5+really1.20.2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y kubernetes
```

Are YOU affected by CVE-2021-25737?

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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