CVE-2023-28450 · cross-distro fix matrix

CVE-2023-28450: An issue was discovered in Dnsmasq before 2.90. The default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 because of DNS Flag Day 2020.

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

Fix per ecosystem

Each block below is a distro release where CVE-2023-28450 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

dnsmasq→ fixed in2.85-1+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y dnsmasq
```

Debian bookworm

Source: Debian Security Tracker

dnsmasq→ fixed in2.90-4~deb12u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y dnsmasq
```

Debian trixie

Source: Debian Security Tracker

dnsmasq→ fixed in2.90-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y dnsmasq
```

Alpine v3.20

Source: Alpine secdb

dnsmasq→ fixed in2.89-r3
```
apk update && apk add --upgrade dnsmasq
```

Alpine v3.21

Source: Alpine secdb

dnsmasq→ fixed in2.89-r3
```
apk update && apk add --upgrade dnsmasq
```

Alpine edge

Source: Alpine secdb

dnsmasq→ fixed in2.89-r3
```
apk update && apk add --upgrade dnsmasq
```

Alpine v3.18

Source: Alpine secdb

dnsmasq→ fixed in2.89-r3
```
apk update && apk add --upgrade dnsmasq
```

Alpine v3.19

Source: Alpine secdb

dnsmasq→ fixed in2.89-r3
```
apk update && apk add --upgrade dnsmasq
```

Are YOU affected by CVE-2023-28450?

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

CVE-2023-28450dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.

See StackPatch ($99 lifetime)