CVE-2026-6653 · cross-distro fix matrix

CVE-2026-6653: Geoffrey Humphreys discovered that libxml2 had a use after free when

Affects 2 Linux releases across 10 (distro × package) combinations. First disclosed: 2026-06-22.

Fix per ecosystem

Each block below is a distro release where CVE-2026-6653 has a known fix. Run the listed command on that distro to remediate.

Ubuntu jammy

Source: Ubuntu USN

libxml2→ fixed in2.9.13+dfsg-1ubuntu0.12USN-8456-1
```
sudo apt-get install --only-upgrade -y libxml2
```
libxml2-dev→ fixed in2.9.13+dfsg-1ubuntu0.12USN-8456-1
```
sudo apt-get install --only-upgrade -y libxml2-dev
```
libxml2-doc→ fixed in2.9.13+dfsg-1ubuntu0.12USN-8456-1
```
sudo apt-get install --only-upgrade -y libxml2-doc
```
libxml2-utils→ fixed in2.9.13+dfsg-1ubuntu0.12USN-8456-1
```
sudo apt-get install --only-upgrade -y libxml2-utils
```
python3-libxml2→ fixed in2.9.13+dfsg-1ubuntu0.12USN-8456-1
```
sudo apt-get install --only-upgrade -y python3-libxml2
```

Ubuntu noble

Source: Ubuntu USN

libxml2→ fixed in2.9.14+dfsg-1.3ubuntu3.8USN-8456-1
```
sudo apt-get install --only-upgrade -y libxml2
```
libxml2-dev→ fixed in2.9.14+dfsg-1.3ubuntu3.8USN-8456-1
```
sudo apt-get install --only-upgrade -y libxml2-dev
```
libxml2-doc→ fixed in2.9.14+dfsg-1.3ubuntu3.8USN-8456-1
```
sudo apt-get install --only-upgrade -y libxml2-doc
```
libxml2-utils→ fixed in2.9.14+dfsg-1.3ubuntu3.8USN-8456-1
```
sudo apt-get install --only-upgrade -y libxml2-utils
```
python3-libxml2→ fixed in2.9.14+dfsg-1.3ubuntu3.8USN-8456-1
```
sudo apt-get install --only-upgrade -y python3-libxml2
```

Are YOU affected by CVE-2026-6653?

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-2026-6653dropped 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. From $9/mo, 14-day free trial, cancel anytime.

See StackPatch (from $9/mo)