CVE-2020-25682 · cross-distro fix matrix

CVE-2020-25682: A flaw was found in dnsmasq before 2.83. A buffer overflow vulnerability was discovered in the way dnsmasq extract names from DNS packets before validating them with DNSSEC data. An attacker on the network, who can create valid DNS replies, could use this flaw to cause an overflow with arbitrary dat

Affects 8 Linux releases across 8 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2020-25682 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

dnsmasq→ fixed in2.83-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y dnsmasq
```

Debian bookworm

Source: Debian Security Tracker

dnsmasq→ fixed in2.83-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y dnsmasq
```

Debian trixie

Source: Debian Security Tracker

dnsmasq→ fixed in2.83-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y dnsmasq
```

Alpine v3.20

Source: Alpine secdb

dnsmasq→ fixed in2.83-r0
```
apk update && apk add --upgrade dnsmasq
```

Alpine v3.21

Source: Alpine secdb

dnsmasq→ fixed in2.83-r0
```
apk update && apk add --upgrade dnsmasq
```

Alpine edge

Source: Alpine secdb

dnsmasq→ fixed in2.83-r0
```
apk update && apk add --upgrade dnsmasq
```

Alpine v3.18

Source: Alpine secdb

dnsmasq→ fixed in2.83-r0
```
apk update && apk add --upgrade dnsmasq
```

Alpine v3.19

Source: Alpine secdb

dnsmasq→ fixed in2.83-r0
```
apk update && apk add --upgrade dnsmasq
```

Are YOU affected by CVE-2020-25682?

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.

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