========================================================================== Ubuntu Security Notice USN-8218-1 April 30, 2026
zulucrypt vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
zuluCrypt could be made to run programs as an administrator.
Software Description:
- zulucrypt: A simple, feature rich and powerful solution for hard drives
encryption
Details:
Aaron Rainbolt discovered that zuluCrypt used insecure PolicyKit
settings in zuluPolkit. An attacker could possibly use this issue to
cause local privilege escalation to root. (CVE-2025-53391)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 24.04 LTS
libzulucrypt-dev 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
libzulucrypt-exe-dev 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
libzulucrypt-exe1.2.0 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
libzulucrypt-plugins 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
libzulucrypt1.2.0 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
libzulucryptpluginmanager-dev 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
libzulucryptpluginmanager1.0.0 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
zulucrypt-cli 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
zulucrypt-gui 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
zulumount-cli 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
zulumount-gui 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
zulupolkit 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
zulusafe-cli 6.2.0-1ubuntu3+esm1
Available with Ubuntu Pro
Ubuntu 22.04 LTS
libzulucrypt-dev 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
libzulucrypt-exe-dev 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
libzulucrypt-exe1.2.0 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
libzulucrypt-plugins 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
libzulucrypt1.2.0 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
libzulucryptpluginmanager-dev 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
libzulucryptpluginmanager1.0.0 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
zulucrypt-cli 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
zulucrypt-gui 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
zulumount-cli 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
zulumount-gui 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
zulupolkit 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
zulusafe-cli 5.7.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 20.04 LTS
libzulucrypt-dev 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
libzulucrypt-exe-dev 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
libzulucrypt-exe1.2.0 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
libzulucrypt-plugins 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
libzulucrypt1.2.0 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
libzulucryptpluginmanager-dev 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
libzulucryptpluginmanager1.0.0 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
zulucrypt-cli 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
zulucrypt-gui 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
zulumount-cli 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
zulumount-gui 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
zulupolkit 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
zulusafe-cli 5.7.0-1ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 18.04 LTS
libzulucrypt-dev 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
libzulucrypt-exe-dev 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
libzulucrypt-exe1.2.0 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
libzulucrypt-plugins 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
libzulucrypt1.2.0 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
libzulucryptpluginmanager-dev 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
libzulucryptpluginmanager1.0.0 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
zulucrypt-cli 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
zulucrypt-gui 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
zulumount-cli 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
zulumount-gui 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
zulupolkit 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
zulusafe-cli 5.4.0-2ubuntu0.1~esm2
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8218-1
CVE-2025-53391
signature.asc
Description: OpenPGP digital signature
