CVE-2025-62291 · cross-distro fix matrix

CVE-2025-62291: In the eap-mschapv2 plugin (client-side) in strongSwan before 6.0.3, a malicious EAP-MSCHAPv2 server can send a crafted message of size 6 through 8, and cause an integer underflow that potentially results in a heap-based buffer overflow.

Affects 6 Linux releases across 6 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2025-62291 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

strongswan→ fixed in5.9.1-1+deb11u5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y strongswan
```

Debian bookworm

Source: Debian Security Tracker

strongswan→ fixed in5.9.8-5+deb12u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y strongswan
```

Debian trixie

Source: Debian Security Tracker

strongswan→ fixed in6.0.1-6+deb13u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y strongswan
```

Alpine v3.20

Source: Alpine secdb

strongswan→ fixed in5.9.13-r2

apk update && apk add --upgrade strongswan

Alpine v3.21

Source: Alpine secdb

strongswan→ fixed in5.9.14-r1

apk update && apk add --upgrade strongswan

Alpine edge

Source: Alpine secdb

strongswan→ fixed in5.9.14-r3

apk update && apk add --upgrade strongswan

Are YOU affected by CVE-2025-62291?

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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Continuous monitoring beats manual checking

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