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[USN-8218-1] zuluCrypt vulnerability

Posted on 30 April 2026
Ubuntu Security

==========================================================================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

--===============0042200207403969558==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

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