UBUNTU-CVE-2025-6020

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Source
https://ubuntu.com/security/CVE-2025-6020
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6020.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2025-6020
Upstream
Downstream
Related
Published
2025-06-17T10:00:00Z
Modified
2026-01-20T20:31:06.609904Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in linux-pam. The module pam_namespace may use access user-controlled paths without proper protection, allowing local users to elevate their privileges to root via multiple symlink attacks and race conditions.

References

Affected packages

Ubuntu:20.04:LTS

pam

Package

Name
pam
Purl
pkg:deb/ubuntu/pam@1.3.1-5ubuntu4.7?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*

1.3.1-5ubuntu1
1.3.1-5ubuntu3
1.3.1-5ubuntu4
1.3.1-5ubuntu4.1
1.3.1-5ubuntu4.2
1.3.1-5ubuntu4.3
1.3.1-5ubuntu4.4
1.3.1-5ubuntu4.6
1.3.1-5ubuntu4.7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.1-5ubuntu4.7",
            "binary_name": "libpam-cracklib"
        },
        {
            "binary_version": "1.3.1-5ubuntu4.7",
            "binary_name": "libpam-modules"
        },
        {
            "binary_version": "1.3.1-5ubuntu4.7",
            "binary_name": "libpam-modules-bin"
        },
        {
            "binary_version": "1.3.1-5ubuntu4.7",
            "binary_name": "libpam-runtime"
        },
        {
            "binary_version": "1.3.1-5ubuntu4.7",
            "binary_name": "libpam0g"
        },
        {
            "binary_version": "1.3.1-5ubuntu4.7",
            "binary_name": "libpam0g-dev"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6020.json"

Ubuntu:22.04:LTS

pam

Package

Name
pam
Purl
pkg:deb/ubuntu/pam@1.4.0-11ubuntu2.6?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.4.0-11ubuntu2.6

Affected versions

1.*

1.3.1-5ubuntu11
1.4.0-10ubuntu1
1.4.0-10ubuntu2
1.4.0-11ubuntu1
1.4.0-11ubuntu2
1.4.0-11ubuntu2.1
1.4.0-11ubuntu2.3
1.4.0-11ubuntu2.4
1.4.0-11ubuntu2.5

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.4.0-11ubuntu2.6",
            "binary_name": "libpam-cracklib"
        },
        {
            "binary_version": "1.4.0-11ubuntu2.6",
            "binary_name": "libpam-modules"
        },
        {
            "binary_version": "1.4.0-11ubuntu2.6",
            "binary_name": "libpam-modules-bin"
        },
        {
            "binary_version": "1.4.0-11ubuntu2.6",
            "binary_name": "libpam-runtime"
        },
        {
            "binary_version": "1.4.0-11ubuntu2.6",
            "binary_name": "libpam0g"
        },
        {
            "binary_version": "1.4.0-11ubuntu2.6",
            "binary_name": "libpam0g-dev"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6020.json"

Ubuntu:24.04:LTS

pam

Package

Name
pam
Purl
pkg:deb/ubuntu/pam@1.5.3-5ubuntu5.4?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.5.3-5ubuntu5.4

Affected versions

1.*

1.5.2-6ubuntu1
1.5.2-9.1ubuntu1
1.5.2-9.1ubuntu2
1.5.2-9.1ubuntu3
1.5.3-5ubuntu3
1.5.3-5ubuntu4
1.5.3-5ubuntu5
1.5.3-5ubuntu5.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.5.3-5ubuntu5.4",
            "binary_name": "libpam-modules"
        },
        {
            "binary_version": "1.5.3-5ubuntu5.4",
            "binary_name": "libpam-modules-bin"
        },
        {
            "binary_version": "1.5.3-5ubuntu5.4",
            "binary_name": "libpam-runtime"
        },
        {
            "binary_version": "1.5.3-5ubuntu5.4",
            "binary_name": "libpam0g"
        },
        {
            "binary_version": "1.5.3-5ubuntu5.4",
            "binary_name": "libpam0g-dev"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6020.json"

Ubuntu:25.10

pam

Package

Name
pam
Purl
pkg:deb/ubuntu/pam@1.5.3-7ubuntu6?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.5.3-7ubuntu6

Affected versions

1.*

1.5.3-7ubuntu4
1.5.3-7ubuntu5

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.5.3-7ubuntu6",
            "binary_name": "libpam-modules"
        },
        {
            "binary_version": "1.5.3-7ubuntu6",
            "binary_name": "libpam-modules-bin"
        },
        {
            "binary_version": "1.5.3-7ubuntu6",
            "binary_name": "libpam-runtime"
        },
        {
            "binary_version": "1.5.3-7ubuntu6",
            "binary_name": "libpam0g"
        },
        {
            "binary_version": "1.5.3-7ubuntu6",
            "binary_name": "libpam0g-dev"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6020.json"

Ubuntu:Pro:14.04:LTS

pam

Package

Name
pam
Purl
pkg:deb/ubuntu/pam@1.1.8-1ubuntu2.2+esm4?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

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

Affected versions

1.*

1.1.3-8ubuntu3
1.1.3-10ubuntu1
1.1.3-11ubuntu1
1.1.8-1ubuntu1
1.1.8-1ubuntu2
1.1.8-1ubuntu2.1
1.1.8-1ubuntu2.2
1.1.8-1ubuntu2.2+esm1
1.1.8-1ubuntu2.2+esm3
1.1.8-1ubuntu2.2+esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.1.8-1ubuntu2.2+esm4",
            "binary_name": "libpam-cracklib"
        },
        {
            "binary_version": "1.1.8-1ubuntu2.2+esm4",
            "binary_name": "libpam-modules"
        },
        {
            "binary_version": "1.1.8-1ubuntu2.2+esm4",
            "binary_name": "libpam-modules-bin"
        },
        {
            "binary_version": "1.1.8-1ubuntu2.2+esm4",
            "binary_name": "libpam-runtime"
        },
        {
            "binary_version": "1.1.8-1ubuntu2.2+esm4",
            "binary_name": "libpam0g"
        },
        {
            "binary_version": "1.1.8-1ubuntu2.2+esm4",
            "binary_name": "libpam0g-dev"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6020.json"

Ubuntu:Pro:16.04:LTS

pam

Package

Name
pam
Purl
pkg:deb/ubuntu/pam@1.1.8-3.2ubuntu2.3+esm5?arch=source&distro=esm-infra/xenial

Affected ranges

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

Affected versions

1.*

1.1.8-3.1ubuntu3
1.1.8-3.2ubuntu2
1.1.8-3.2ubuntu2.1
1.1.8-3.2ubuntu2.3
1.1.8-3.2ubuntu2.3+esm1
1.1.8-3.2ubuntu2.3+esm2
1.1.8-3.2ubuntu2.3+esm4
1.1.8-3.2ubuntu2.3+esm5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.1.8-3.2ubuntu2.3+esm5",
            "binary_name": "libpam-cracklib"
        },
        {
            "binary_version": "1.1.8-3.2ubuntu2.3+esm5",
            "binary_name": "libpam-modules"
        },
        {
            "binary_version": "1.1.8-3.2ubuntu2.3+esm5",
            "binary_name": "libpam-modules-bin"
        },
        {
            "binary_version": "1.1.8-3.2ubuntu2.3+esm5",
            "binary_name": "libpam-runtime"
        },
        {
            "binary_version": "1.1.8-3.2ubuntu2.3+esm5",
            "binary_name": "libpam0g"
        },
        {
            "binary_version": "1.1.8-3.2ubuntu2.3+esm5",
            "binary_name": "libpam0g-dev"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6020.json"

Ubuntu:Pro:18.04:LTS

pam

Package

Name
pam
Purl
pkg:deb/ubuntu/pam@1.1.8-3.6ubuntu2.18.04.6+esm1?arch=source&distro=esm-infra/bionic

Affected ranges

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

Affected versions

1.*

1.1.8-3.2ubuntu3
1.1.8-3.2ubuntu4
1.1.8-3.6ubuntu1
1.1.8-3.6ubuntu2
1.1.8-3.6ubuntu2.18.04.1
1.1.8-3.6ubuntu2.18.04.2
1.1.8-3.6ubuntu2.18.04.3
1.1.8-3.6ubuntu2.18.04.4
1.1.8-3.6ubuntu2.18.04.6
1.1.8-3.6ubuntu2.18.04.6+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.1.8-3.6ubuntu2.18.04.6+esm1",
            "binary_name": "libpam-cracklib"
        },
        {
            "binary_version": "1.1.8-3.6ubuntu2.18.04.6+esm1",
            "binary_name": "libpam-modules"
        },
        {
            "binary_version": "1.1.8-3.6ubuntu2.18.04.6+esm1",
            "binary_name": "libpam-modules-bin"
        },
        {
            "binary_version": "1.1.8-3.6ubuntu2.18.04.6+esm1",
            "binary_name": "libpam-runtime"
        },
        {
            "binary_version": "1.1.8-3.6ubuntu2.18.04.6+esm1",
            "binary_name": "libpam0g"
        },
        {
            "binary_version": "1.1.8-3.6ubuntu2.18.04.6+esm1",
            "binary_name": "libpam0g-dev"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6020.json"