UBUNTU-CVE-2026-4897

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Source
https://ubuntu.com/security/CVE-2026-4897
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4897.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-4897
Upstream
  • CVE-2026-4897
Downstream
Related
Published
2026-03-26T15:16:00Z
Modified
2026-04-22T16:34:47.702456Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively long input to the polkit-agent-helper-1 setuid binary via standard input (stdin). This unbounded input can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system.

References

Affected packages

Ubuntu:18.04:LTS
policykit-1

Package

Name
policykit-1
Purl
pkg:deb/ubuntu/policykit-1@0.105-20ubuntu0.18.04.6?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.105-18
0.105-20
0.105-20ubuntu0.18.04.1
0.105-20ubuntu0.18.04.4
0.105-20ubuntu0.18.04.5
0.105-20ubuntu0.18.04.6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.105-20ubuntu0.18.04.6",
            "binary_name": "gir1.2-polkit-1.0"
        },
        {
            "binary_version": "0.105-20ubuntu0.18.04.6",
            "binary_name": "libpolkit-agent-1-0"
        },
        {
            "binary_version": "0.105-20ubuntu0.18.04.6",
            "binary_name": "libpolkit-backend-1-0"
        },
        {
            "binary_version": "0.105-20ubuntu0.18.04.6",
            "binary_name": "libpolkit-gobject-1-0"
        },
        {
            "binary_version": "0.105-20ubuntu0.18.04.6",
            "binary_name": "policykit-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4897.json"
Ubuntu:20.04:LTS
policykit-1

Package

Name
policykit-1
Purl
pkg:deb/ubuntu/policykit-1@0.105-26ubuntu1.3?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.105-26ubuntu1
0.105-26ubuntu1.1
0.105-26ubuntu1.2
0.105-26ubuntu1.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.105-26ubuntu1.3",
            "binary_name": "gir1.2-polkit-1.0"
        },
        {
            "binary_version": "0.105-26ubuntu1.3",
            "binary_name": "libpolkit-agent-1-0"
        },
        {
            "binary_version": "0.105-26ubuntu1.3",
            "binary_name": "libpolkit-gobject-1-0"
        },
        {
            "binary_version": "0.105-26ubuntu1.3",
            "binary_name": "policykit-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4897.json"
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-gobject-1-0"
        },
        {
            "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/cve/2026/UBUNTU-CVE-2026-4897.json"
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-gobject-1-0"
        },
        {
            "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/cve/2026/UBUNTU-CVE-2026-4897.json"
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-gobject-1-0"
        },
        {
            "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/cve/2026/UBUNTU-CVE-2026-4897.json"
Ubuntu:Pro:14.04:LTS
policykit-1

Package

Name
policykit-1
Purl
pkg:deb/ubuntu/policykit-1@0.105-4ubuntu3.14.04.6+esm1?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.105-3ubuntu3
0.105-4ubuntu1
0.105-4ubuntu2
0.105-4ubuntu2.14.04.1
0.105-4ubuntu3.14.04.1
0.105-4ubuntu3.14.04.2
0.105-4ubuntu3.14.04.5
0.105-4ubuntu3.14.04.6
0.105-4ubuntu3.14.04.6+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.105-4ubuntu3.14.04.6+esm1",
            "binary_name": "gir1.2-polkit-1.0"
        },
        {
            "binary_version": "0.105-4ubuntu3.14.04.6+esm1",
            "binary_name": "libpolkit-agent-1-0"
        },
        {
            "binary_version": "0.105-4ubuntu3.14.04.6+esm1",
            "binary_name": "libpolkit-backend-1-0"
        },
        {
            "binary_version": "0.105-4ubuntu3.14.04.6+esm1",
            "binary_name": "libpolkit-gobject-1-0"
        },
        {
            "binary_version": "0.105-4ubuntu3.14.04.6+esm1",
            "binary_name": "policykit-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4897.json"
Ubuntu:Pro:16.04:LTS
policykit-1

Package

Name
policykit-1
Purl
pkg:deb/ubuntu/policykit-1@0.105-14.1ubuntu0.5+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.105-11ubuntu2
0.105-13
0.105-13ubuntu1
0.105-14
0.105-14.1
0.105-14.1ubuntu0.1
0.105-14.1ubuntu0.4
0.105-14.1ubuntu0.5
0.105-14.1ubuntu0.5+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.105-14.1ubuntu0.5+esm1",
            "binary_name": "gir1.2-polkit-1.0"
        },
        {
            "binary_version": "0.105-14.1ubuntu0.5+esm1",
            "binary_name": "libpolkit-agent-1-0"
        },
        {
            "binary_version": "0.105-14.1ubuntu0.5+esm1",
            "binary_name": "libpolkit-backend-1-0"
        },
        {
            "binary_version": "0.105-14.1ubuntu0.5+esm1",
            "binary_name": "libpolkit-gobject-1-0"
        },
        {
            "binary_version": "0.105-14.1ubuntu0.5+esm1",
            "binary_name": "policykit-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4897.json"