CVE-2026-43000 · cross-distro fix matrix

CVE-2026-43000: It was discovered that OpenStack Keystone allowed restricted application

Affects 7 Linux releases across 19 (distro × package) combinations. First disclosed: 2026-05-28.

CVSS v3:MEDIUM · 6(NVD-published)

Fix per ecosystem

Each block below is a distro release where CVE-2026-43000 has a known fix. Run the listed command on that distro to remediate.

Ubuntu jammy

Source: Ubuntu USN

keystone→ fixed in2:21.0.1-0ubuntu2.4USN-8433-1
```
sudo apt-get install --only-upgrade -y keystone
```
keystone-common→ fixed in2:21.0.1-0ubuntu2.4USN-8433-1
```
sudo apt-get install --only-upgrade -y keystone-common
```
keystone-doc→ fixed in2:21.0.1-0ubuntu2.4USN-8433-1
```
sudo apt-get install --only-upgrade -y keystone-doc
```
python3-keystone→ fixed in2:21.0.1-0ubuntu2.4USN-8433-1
```
sudo apt-get install --only-upgrade -y python3-keystone
```

Ubuntu noble

Source: Ubuntu USN

keystone→ fixed in2:25.0.0-0ubuntu1.4USN-8433-1
```
sudo apt-get install --only-upgrade -y keystone
```
keystone-common→ fixed in2:25.0.0-0ubuntu1.4USN-8433-1
```
sudo apt-get install --only-upgrade -y keystone-common
```
keystone-doc→ fixed in2:25.0.0-0ubuntu1.4USN-8433-1
```
sudo apt-get install --only-upgrade -y keystone-doc
```
python3-keystone→ fixed in2:25.0.0-0ubuntu1.4USN-8433-1
```
sudo apt-get install --only-upgrade -y python3-keystone
```

Ubuntu questing

Source: Ubuntu USN

keystone→ fixed in2:28.0.0-0ubuntu1.3USN-8433-1
```
sudo apt-get install --only-upgrade -y keystone
```
keystone-common→ fixed in2:28.0.0-0ubuntu1.3USN-8433-1
```
sudo apt-get install --only-upgrade -y keystone-common
```
keystone-doc→ fixed in2:28.0.0-0ubuntu1.3USN-8433-1
```
sudo apt-get install --only-upgrade -y keystone-doc
```
python3-keystone→ fixed in2:28.0.0-0ubuntu1.3USN-8433-1
```
sudo apt-get install --only-upgrade -y python3-keystone
```

Ubuntu resolute

Source: Ubuntu USN

keystone→ fixed in2:29.0.0-0ubuntu1.2USN-8433-1
```
sudo apt-get install --only-upgrade -y keystone
```
keystone-common→ fixed in2:29.0.0-0ubuntu1.2USN-8433-1
```
sudo apt-get install --only-upgrade -y keystone-common
```
keystone-doc→ fixed in2:29.0.0-0ubuntu1.2USN-8433-1
```
sudo apt-get install --only-upgrade -y keystone-doc
```
python3-keystone→ fixed in2:29.0.0-0ubuntu1.2USN-8433-1
```
sudo apt-get install --only-upgrade -y python3-keystone
```

Debian bullseye

Source: Debian Security Tracker

keystone→ fixed in2:18.1.0-1+deb11u3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y keystone
```

Debian bookworm

Source: Debian Security Tracker

keystone→ fixed in2:22.0.2-0+deb12u3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y keystone
```

Debian trixie

Source: Debian Security Tracker

keystone→ fixed in2:27.0.0-3+deb13u4urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y keystone
```

Are YOU affected by CVE-2026-43000?

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-2026-43000dropped 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)