CVE-2020-8597 · cross-distro fix matrix

CVE-2020-8597: It was discovered that lwIP contained a buffer overflow in the EAP

Affects 12 Linux releases across 27 (distro × package) combinations. First disclosed: 2026-06-11.

Fix per ecosystem

Each block below is a distro release where CVE-2020-8597 has a known fix. Run the listed command on that distro to remediate.

Ubuntu focal

Source: Ubuntu USN

lwip→ fixed in2.1.2+dfsg1-4ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y lwip
```
liblwip-dev→ fixed in2.1.2+dfsg1-4ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y liblwip-dev
```
liblwip-doc→ fixed in2.1.2+dfsg1-4ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y liblwip-doc
```
liblwip0→ fixed in2.1.2+dfsg1-4ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y liblwip0
```

Ubuntu jammy

Source: Ubuntu USN

lwip→ fixed in2.1.3+dfsg1-1ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y lwip
```
liblwip-dev→ fixed in2.1.3+dfsg1-1ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y liblwip-dev
```
liblwip-doc→ fixed in2.1.3+dfsg1-1ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y liblwip-doc
```
liblwip0→ fixed in2.1.3+dfsg1-1ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y liblwip0
```

Ubuntu noble

Source: Ubuntu USN

lwip→ fixed in2.2.0+dfsg1-6.1ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y lwip
```
liblwip-dev→ fixed in2.2.0+dfsg1-6.1ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y liblwip-dev
```
liblwip-doc→ fixed in2.2.0+dfsg1-6.1ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y liblwip-doc
```
liblwip0t64→ fixed in2.2.0+dfsg1-6.1ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y liblwip0t64
```

Ubuntu resolute

Source: Ubuntu USN

lwip→ fixed in2.2.1+dfsg1-4ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y lwip
```
liblwip-dev→ fixed in2.2.1+dfsg1-4ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y liblwip-dev
```
liblwip-doc→ fixed in2.2.1+dfsg1-4ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y liblwip-doc
```
liblwip0t64→ fixed in2.2.1+dfsg1-4ubuntu0.1~esm1USN-8423-1
```
sudo apt-get install --only-upgrade -y liblwip0t64
```

Debian bullseye

Source: Debian Security Tracker

lwip→ fixed in2.1.2+dfsg1-5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y lwip
```
ppp→ fixed in2.4.8-1+1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ppp
```

Debian bookworm

Source: Debian Security Tracker

lwip→ fixed in2.1.2+dfsg1-5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y lwip
```
ppp→ fixed in2.4.8-1+1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ppp
```

Debian trixie

Source: Debian Security Tracker

lwip→ fixed in2.1.2+dfsg1-5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y lwip
```
ppp→ fixed in2.4.8-1+1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ppp
```

Alpine v3.20

Source: Alpine secdb

ppp→ fixed in2.4.8-r1
```
apk update && apk add --upgrade ppp
```

Alpine v3.21

Source: Alpine secdb

ppp→ fixed in2.4.8-r1
```
apk update && apk add --upgrade ppp
```

Alpine edge

Source: Alpine secdb

ppp→ fixed in2.4.8-r1
```
apk update && apk add --upgrade ppp
```

Alpine v3.18

Source: Alpine secdb

ppp→ fixed in2.4.8-r1
```
apk update && apk add --upgrade ppp
```

Alpine v3.19

Source: Alpine secdb

ppp→ fixed in2.4.8-r1
```
apk update && apk add --upgrade ppp
```

Are YOU affected by CVE-2020-8597?

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-2020-8597dropped 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)