CVE-2021-43612 · cross-distro fix matrix

CVE-2021-43612: In lldpd before 1.0.13, when decoding SONMP packets in the sonmp_decode function, it's possible to trigger an out-of-bounds heap read via short SONMP packets.

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-43612 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

lldpd→ fixed in1.0.11-1+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y lldpd
```

Debian bookworm

Source: Debian Security Tracker

lldpd→ fixed in1.0.13-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y lldpd
```

Debian trixie

Source: Debian Security Tracker

lldpd→ fixed in1.0.13-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y lldpd
```

Alpine v3.20

Source: Alpine secdb

lldpd→ fixed in1.0.13-r0
```
apk update && apk add --upgrade lldpd
```

Alpine v3.21

Source: Alpine secdb

lldpd→ fixed in1.0.13-r0
```
apk update && apk add --upgrade lldpd
```

Alpine edge

Source: Alpine secdb

lldpd→ fixed in1.0.13-r0
```
apk update && apk add --upgrade lldpd
```

Alpine v3.18

Source: Alpine secdb

lldpd→ fixed in1.0.13-r0
```
apk update && apk add --upgrade lldpd
```

Alpine v3.19

Source: Alpine secdb

lldpd→ fixed in1.0.13-r0
```
apk update && apk add --upgrade lldpd
```

Are YOU affected by CVE-2021-43612?

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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