CVE-2025-31498 · cross-distro fix matrix

CVE-2025-31498: c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in read_answers() when process_answer() may re-enqueue a query either due to a DNS Cookie Failure or when the upstream server does not properly support EDNS, or possibly on TCP queries if the remote clo

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

Fix per ecosystem

Each block below is a distro release where CVE-2025-31498 has a known fix. Run the listed command on that distro to remediate.

Debian trixie

Source: Debian Security Tracker

c-ares→ fixed in1.34.5-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y c-ares
```

Alpine v3.21

Source: Alpine secdb

c-ares→ fixed in1.34.5-r0
```
apk update && apk add --upgrade c-ares
```

Alpine edge

Source: Alpine secdb

c-ares→ fixed in1.34.5-r0
```
apk update && apk add --upgrade c-ares
```

Are YOU affected by CVE-2025-31498?

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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