USN-8601-1

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Source
https://ubuntu.com/security/notices/USN-8601-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8601-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8601-1
Upstream
Related
Published
2026-07-23T14:49:52Z
Modified
2026-07-24T01:35:02.512249924Z
Summary
pam vulnerability
Details

It was discovered that PAM had a timing discrepancy in the pam_userdb module when comparing plaintext passwords. An attacker could possibly use this issue to obtain sensitive information by measuring response-timing differences during repeated authentication attempts.

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
0Unknown 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_version": "1.4.0-11ubuntu2.7",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8601-1.json"
cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-54411",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "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",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:22.04:LTS"
}

Ubuntu:24.04:LTS / pam

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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_version": "1.5.3-5ubuntu5.6",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8601-1.json"
cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-54411",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "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",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:24.04:LTS"
}

Ubuntu:26.04:LTS / pam

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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_version": "1.7.0-5ubuntu3.1",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8601-1.json"
cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-54411",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "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",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:26.04:LTS"
}