CVE-2021-3181 · cross-distro fix matrix

CVE-2021-3181: rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields (aka terminators of empty groups). A small email message from the attacker can cause large memory con

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-3181 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

mutt→ fixed in2.0.5-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mutt
```

Debian bookworm

Source: Debian Security Tracker

mutt→ fixed in2.0.5-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mutt
```

Debian trixie

Source: Debian Security Tracker

mutt→ fixed in2.0.5-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mutt
```

Alpine v3.20

Source: Alpine secdb

mutt→ fixed in2.0.4-r1
```
apk update && apk add --upgrade mutt
```

Alpine v3.21

Source: Alpine secdb

mutt→ fixed in2.0.4-r1
```
apk update && apk add --upgrade mutt
```

Alpine edge

Source: Alpine secdb

mutt→ fixed in2.0.4-r1
```
apk update && apk add --upgrade mutt
```

Alpine v3.18

Source: Alpine secdb

mutt→ fixed in2.0.4-r1
```
apk update && apk add --upgrade mutt
```

Alpine v3.19

Source: Alpine secdb

mutt→ fixed in2.0.4-r1
```
apk update && apk add --upgrade mutt
```

Are YOU affected by CVE-2021-3181?

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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