USN-8173-1

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Source
https://ubuntu.com/security/notices/USN-8173-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8173-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8173-1
Upstream
Related
Published
2026-04-14T08:02:28Z
Modified
2026-04-16T11:14:11.073633214Z
Summary
policykit-1 vulnerabilities
Details

It was discovered that polkit incorrectly handled nested elements in XML policy files. If an administrator were tricked into installing a malicious policy file, a remote attacker could possibly use this issue to cause polkit to crash, resulting in a denial of service. (CVE-2025-7519)

Pavel Kohout discovered that the polkit polkit-agent-helper-1 utility incorrectly handled long input. A local attacker could possibly use this issue to cause polkit to crash, resulting in a denial of service. (CVE-2026-4897)

References

Affected packages

Ubuntu:22.04:LTS / policykit-1

Package

Name
policykit-1
Purl
pkg:deb/ubuntu/policykit-1@0.105-33ubuntu0.1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.105-33ubuntu0.1

Affected versions

0.*
0.105-31
0.105-31ubuntu1
0.105-31.1
0.105-32
0.105-33

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.105-33ubuntu0.1",
            "binary_name": "gir1.2-polkit-1.0"
        },
        {
            "binary_version": "0.105-33ubuntu0.1",
            "binary_name": "libpolkit-agent-1-0"
        },
        {
            "binary_version": "0.105-33ubuntu0.1",
            "binary_name": "libpolkit-agent-1-dev"
        },
        {
            "binary_version": "0.105-33ubuntu0.1",
            "binary_name": "libpolkit-gobject-1-0"
        },
        {
            "binary_version": "0.105-33ubuntu0.1",
            "binary_name": "libpolkit-gobject-1-dev"
        },
        {
            "binary_version": "0.105-33ubuntu0.1",
            "binary_name": "pkexec"
        },
        {
            "binary_version": "0.105-33ubuntu0.1",
            "binary_name": "policykit-1"
        },
        {
            "binary_version": "0.105-33ubuntu0.1",
            "binary_name": "polkitd"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8173-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "id": "CVE-2025-7519",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "low"
                }
            ]
        },
        {
            "id": "CVE-2026-4897",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:24.04:LTS / policykit-1

Package

Name
policykit-1
Purl
pkg:deb/ubuntu/policykit-1@124-2ubuntu1.24.04.3?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
124-2ubuntu1.24.04.3

Affected versions

Other
123-1
123-3
124-1
124-1ubuntu1
124-2ubuntu1
124-2ubuntu1.*
124-2ubuntu1.24.04.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "124-2ubuntu1.24.04.3",
            "binary_name": "gir1.2-polkit-1.0"
        },
        {
            "binary_version": "124-2ubuntu1.24.04.3",
            "binary_name": "libpolkit-agent-1-0"
        },
        {
            "binary_version": "124-2ubuntu1.24.04.3",
            "binary_name": "libpolkit-agent-1-dev"
        },
        {
            "binary_version": "124-2ubuntu1.24.04.3",
            "binary_name": "libpolkit-gobject-1-0"
        },
        {
            "binary_version": "124-2ubuntu1.24.04.3",
            "binary_name": "libpolkit-gobject-1-dev"
        },
        {
            "binary_version": "124-2ubuntu1.24.04.3",
            "binary_name": "pkexec"
        },
        {
            "binary_version": "124-2ubuntu1.24.04.3",
            "binary_name": "policykit-1"
        },
        {
            "binary_version": "124-2ubuntu1.24.04.3",
            "binary_name": "polkitd"
        },
        {
            "binary_version": "124-2ubuntu1.24.04.3",
            "binary_name": "polkitd-pkla"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8173-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "id": "CVE-2025-7519",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "low"
                }
            ]
        },
        {
            "id": "CVE-2026-4897",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:25.10 / policykit-1

Package

Name
policykit-1
Purl
pkg:deb/ubuntu/policykit-1@126-2ubuntu0.1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
126-2ubuntu0.1

Affected versions

Other
126-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "126-2ubuntu0.1",
            "binary_name": "gir1.2-polkit-1.0"
        },
        {
            "binary_version": "126-2ubuntu0.1",
            "binary_name": "libpolkit-agent-1-0"
        },
        {
            "binary_version": "126-2ubuntu0.1",
            "binary_name": "libpolkit-agent-1-dev"
        },
        {
            "binary_version": "126-2ubuntu0.1",
            "binary_name": "libpolkit-gobject-1-0"
        },
        {
            "binary_version": "126-2ubuntu0.1",
            "binary_name": "libpolkit-gobject-1-dev"
        },
        {
            "binary_version": "126-2ubuntu0.1",
            "binary_name": "pkexec"
        },
        {
            "binary_version": "126-2ubuntu0.1",
            "binary_name": "polkitd"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8173-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:25.10",
    "cves": [
        {
            "id": "CVE-2025-7519",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "low"
                }
            ]
        },
        {
            "id": "CVE-2026-4897",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}