UBUNTU-CVE-2026-54411

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Source

https://ubuntu.com/security/CVE-2026-54411

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54411.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-54411

Upstream

CVE-2026-54411

Downstream

USN-8601-1

Related

USN-8601-1

Published

2026-06-14T18:17:00Z

Modified

2026-08-31T17:16:31Z

Severity

5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/AU:N/V:D CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pam_userdb module's plaintext-password comparison path in modules/pam_userdb/pam_userdb.c that allows a local or network-adjacent attacker able to repeatedly drive authentication through a calling service to recover the plaintext password of a target account by measuring response-timing differences.

References

Affected packages

Ubuntu:22.04:LTS

pam

Package

Name: pam
Purl: pkg:deb/ubuntu/pam?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.4.0-11ubuntu2.7

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

1.4.0-11ubuntu2.6

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libpam-cracklib",
            "binary_version": "1.4.0-11ubuntu2.7"
        },
        {
            "binary_name": "libpam-modules",
            "binary_version": "1.4.0-11ubuntu2.7"
        },
        {
            "binary_name": "libpam-modules-bin",
            "binary_version": "1.4.0-11ubuntu2.7"
        },
        {
            "binary_name": "libpam-runtime",
            "binary_version": "1.4.0-11ubuntu2.7"
        },
        {
            "binary_name": "libpam0g",
            "binary_version": "1.4.0-11ubuntu2.7"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54411.json"

Ubuntu:24.04:LTS

pam

Package

Name: pam
Purl: pkg:deb/ubuntu/pam?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.5.3-5ubuntu5.6

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

1.5.3-5ubuntu5.4

1.5.3-5ubuntu5.5

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libpam-modules",
            "binary_version": "1.5.3-5ubuntu5.6"
        },
        {
            "binary_name": "libpam-modules-bin",
            "binary_version": "1.5.3-5ubuntu5.6"
        },
        {
            "binary_name": "libpam-runtime",
            "binary_version": "1.5.3-5ubuntu5.6"
        },
        {
            "binary_name": "libpam0g",
            "binary_version": "1.5.3-5ubuntu5.6"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54411.json"

Ubuntu:25.10

pam

Package

Name: pam
Purl: pkg:deb/ubuntu/pam?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.5.3-7ubuntu4

1.5.3-7ubuntu5

1.5.3-7ubuntu6

1.7.0-5ubuntu1

1.7.0-5ubuntu2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libpam-modules",
            "binary_version": "1.7.0-5ubuntu2"
        },
        {
            "binary_name": "libpam-modules-bin",
            "binary_version": "1.7.0-5ubuntu2"
        },
        {
            "binary_name": "libpam-runtime",
            "binary_version": "1.7.0-5ubuntu2"
        },
        {
            "binary_name": "libpam0g",
            "binary_version": "1.7.0-5ubuntu2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54411.json"

Ubuntu:26.04:LTS

pam

Package

Name: pam
Purl: pkg:deb/ubuntu/pam?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.7.0-5ubuntu3.1

Affected versions

1.*

1.7.0-5ubuntu2

1.7.0-5ubuntu3

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libpam-modules",
            "binary_version": "1.7.0-5ubuntu3.1"
        },
        {
            "binary_name": "libpam-modules-bin",
            "binary_version": "1.7.0-5ubuntu3.1"
        },
        {
            "binary_name": "libpam-runtime",
            "binary_version": "1.7.0-5ubuntu3.1"
        },
        {
            "binary_name": "libpam0g",
            "binary_version": "1.7.0-5ubuntu3.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54411.json"

Ubuntu:Pro:14.04:LTS

pam

Package

Name: pam
Purl: pkg:deb/ubuntu/pam?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown 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_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"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54411.json"

Ubuntu:Pro:16.04:LTS

pam

Package

Name: pam
Purl: pkg:deb/ubuntu/pam?arch=source&distro=esm-infra%2Fxenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown 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_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"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54411.json"

Ubuntu:Pro:18.04:LTS

pam

Package

Name: pam
Purl: pkg:deb/ubuntu/pam?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown 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

1.1.8-3.6ubuntu2.18.04.6+esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libpam-cracklib",
            "binary_version": "1.1.8-3.6ubuntu2.18.04.6+esm2"
        },
        {
            "binary_name": "libpam-modules",
            "binary_version": "1.1.8-3.6ubuntu2.18.04.6+esm2"
        },
        {
            "binary_name": "libpam-modules-bin",
            "binary_version": "1.1.8-3.6ubuntu2.18.04.6+esm2"
        },
        {
            "binary_name": "libpam-runtime",
            "binary_version": "1.1.8-3.6ubuntu2.18.04.6+esm2"
        },
        {
            "binary_name": "libpam0g",
            "binary_version": "1.1.8-3.6ubuntu2.18.04.6+esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54411.json"

Ubuntu:Pro:20.04:LTS

pam

Package

Name: pam
Purl: pkg:deb/ubuntu/pam?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown 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

1.3.1-5ubuntu4.7+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libpam-cracklib",
            "binary_version": "1.3.1-5ubuntu4.7+esm1"
        },
        {
            "binary_name": "libpam-modules",
            "binary_version": "1.3.1-5ubuntu4.7+esm1"
        },
        {
            "binary_name": "libpam-modules-bin",
            "binary_version": "1.3.1-5ubuntu4.7+esm1"
        },
        {
            "binary_name": "libpam-runtime",
            "binary_version": "1.3.1-5ubuntu4.7+esm1"
        },
        {
            "binary_name": "libpam0g",
            "binary_version": "1.3.1-5ubuntu4.7+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54411.json"