USN-8218-1

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Source
https://ubuntu.com/security/notices/USN-8218-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8218-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8218-1
Upstream
Related
Published
2026-04-30T13:50:22Z
Modified
2026-05-04T10:45:14.706721147Z
Summary
zulucrypt vulnerability
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)

References

Affected packages

Ubuntu:Pro:18.04:LTS / zulucrypt

Package

Name
zulucrypt
Purl
pkg:deb/ubuntu/zulucrypt@5.4.0-2ubuntu0.1~esm2?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.4.0-2ubuntu0.1~esm2

Affected versions

5.*
5.2.0-1
5.2.0-3
5.4.0-2
5.4.0-2build1
5.4.0-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.4.0-2ubuntu0.1~esm2",
            "binary_name": "libzulucrypt-exe1.2.0"
        },
        {
            "binary_version": "5.4.0-2ubuntu0.1~esm2",
            "binary_name": "libzulucrypt-plugins"
        },
        {
            "binary_version": "5.4.0-2ubuntu0.1~esm2",
            "binary_name": "libzulucrypt1.2.0"
        },
        {
            "binary_version": "5.4.0-2ubuntu0.1~esm2",
            "binary_name": "libzulucryptpluginmanager1.0.0"
        },
        {
            "binary_version": "5.4.0-2ubuntu0.1~esm2",
            "binary_name": "zulucrypt-cli"
        },
        {
            "binary_version": "5.4.0-2ubuntu0.1~esm2",
            "binary_name": "zulucrypt-gui"
        },
        {
            "binary_version": "5.4.0-2ubuntu0.1~esm2",
            "binary_name": "zulumount-cli"
        },
        {
            "binary_version": "5.4.0-2ubuntu0.1~esm2",
            "binary_name": "zulumount-gui"
        },
        {
            "binary_version": "5.4.0-2ubuntu0.1~esm2",
            "binary_name": "zulupolkit"
        },
        {
            "binary_version": "5.4.0-2ubuntu0.1~esm2",
            "binary_name": "zulusafe-cli"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:18.04:LTS",
    "cves": [
        {
            "id": "CVE-2025-53391",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8218-1.json"

Ubuntu:Pro:20.04:LTS / zulucrypt

Package

Name
zulucrypt
Purl
pkg:deb/ubuntu/zulucrypt@5.7.0-1ubuntu0.1~esm1?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.7.0-1ubuntu0.1~esm1

Affected versions

5.*
5.5.0-1
5.6.0-1
5.6.0-2
5.7.0-1
5.7.0-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.7.0-1ubuntu0.1~esm1",
            "binary_name": "libzulucrypt-exe1.2.0"
        },
        {
            "binary_version": "5.7.0-1ubuntu0.1~esm1",
            "binary_name": "libzulucrypt-plugins"
        },
        {
            "binary_version": "5.7.0-1ubuntu0.1~esm1",
            "binary_name": "libzulucrypt1.2.0"
        },
        {
            "binary_version": "5.7.0-1ubuntu0.1~esm1",
            "binary_name": "libzulucryptpluginmanager1.0.0"
        },
        {
            "binary_version": "5.7.0-1ubuntu0.1~esm1",
            "binary_name": "zulucrypt-cli"
        },
        {
            "binary_version": "5.7.0-1ubuntu0.1~esm1",
            "binary_name": "zulucrypt-gui"
        },
        {
            "binary_version": "5.7.0-1ubuntu0.1~esm1",
            "binary_name": "zulumount-cli"
        },
        {
            "binary_version": "5.7.0-1ubuntu0.1~esm1",
            "binary_name": "zulumount-gui"
        },
        {
            "binary_version": "5.7.0-1ubuntu0.1~esm1",
            "binary_name": "zulupolkit"
        },
        {
            "binary_version": "5.7.0-1ubuntu0.1~esm1",
            "binary_name": "zulusafe-cli"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": [
        {
            "id": "CVE-2025-53391",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8218-1.json"

Ubuntu:Pro:22.04:LTS / zulucrypt

Package

Name
zulucrypt
Purl
pkg:deb/ubuntu/zulucrypt@5.7.1-2ubuntu0.1~esm1?arch=source&distro=esm-apps/jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.7.1-2ubuntu0.1~esm1

Affected versions

5.*
5.7.1-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.7.1-2ubuntu0.1~esm1",
            "binary_name": "libzulucrypt-exe1.2.0"
        },
        {
            "binary_version": "5.7.1-2ubuntu0.1~esm1",
            "binary_name": "libzulucrypt-plugins"
        },
        {
            "binary_version": "5.7.1-2ubuntu0.1~esm1",
            "binary_name": "libzulucrypt1.2.0"
        },
        {
            "binary_version": "5.7.1-2ubuntu0.1~esm1",
            "binary_name": "libzulucryptpluginmanager1.0.0"
        },
        {
            "binary_version": "5.7.1-2ubuntu0.1~esm1",
            "binary_name": "zulucrypt-cli"
        },
        {
            "binary_version": "5.7.1-2ubuntu0.1~esm1",
            "binary_name": "zulucrypt-gui"
        },
        {
            "binary_version": "5.7.1-2ubuntu0.1~esm1",
            "binary_name": "zulumount-cli"
        },
        {
            "binary_version": "5.7.1-2ubuntu0.1~esm1",
            "binary_name": "zulumount-gui"
        },
        {
            "binary_version": "5.7.1-2ubuntu0.1~esm1",
            "binary_name": "zulupolkit"
        },
        {
            "binary_version": "5.7.1-2ubuntu0.1~esm1",
            "binary_name": "zulusafe-cli"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:22.04:LTS",
    "cves": [
        {
            "id": "CVE-2025-53391",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8218-1.json"

Ubuntu:Pro:24.04:LTS / zulucrypt

Package

Name
zulucrypt
Purl
pkg:deb/ubuntu/zulucrypt@6.2.0-1ubuntu3+esm1?arch=source&distro=esm-apps/noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.2.0-1ubuntu3+esm1

Affected versions

6.*
6.2.0-1ubuntu1
6.2.0-1ubuntu2
6.2.0-1ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "6.2.0-1ubuntu3+esm1",
            "binary_name": "libzulucrypt-exe1.2.0"
        },
        {
            "binary_version": "6.2.0-1ubuntu3+esm1",
            "binary_name": "libzulucrypt-plugins"
        },
        {
            "binary_version": "6.2.0-1ubuntu3+esm1",
            "binary_name": "libzulucrypt1.2.0"
        },
        {
            "binary_version": "6.2.0-1ubuntu3+esm1",
            "binary_name": "libzulucryptpluginmanager1.0.0"
        },
        {
            "binary_version": "6.2.0-1ubuntu3+esm1",
            "binary_name": "zulucrypt-cli"
        },
        {
            "binary_version": "6.2.0-1ubuntu3+esm1",
            "binary_name": "zulucrypt-gui"
        },
        {
            "binary_version": "6.2.0-1ubuntu3+esm1",
            "binary_name": "zulumount-cli"
        },
        {
            "binary_version": "6.2.0-1ubuntu3+esm1",
            "binary_name": "zulumount-gui"
        },
        {
            "binary_version": "6.2.0-1ubuntu3+esm1",
            "binary_name": "zulupolkit"
        },
        {
            "binary_version": "6.2.0-1ubuntu3+esm1",
            "binary_name": "zulusafe-cli"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:24.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-53391"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8218-1.json"