CVE-2026-54411

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Source
https://cve.org/CVERecord?id=CVE-2026-54411
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-54411.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-54411
Downstream
Related
Published
2026-06-14T17:21:43.853Z
Modified
2026-08-19T08:57:05.499072152Z
Severity
  • 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
Summary
Linux-PAM pam_userdb Observable Timing Discrepancy in Plaintext Password Comparison
Details

Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pamuserdb module's plaintext-password comparison path in modules/pamuserdb/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.

Database specific 
{
    "cwe_ids": [
        "CWE-208"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54411.json",
    "cna_assigner": "TuranSec"
}
References

Affected packages

Git / github.com/linux-pam/linux-pam

Affected ranges

Type
GIT
Repo
https://github.com/linux-pam/linux-pam
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
fe03a10115c082a8486ccbab7462139d7e4bb067
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.7.2"
        },
        {
            "fixed": "1.7.2"
        }
    ]
}

Affected versions

Other
Linux-PAM-0-73
Linux-PAM-0-74
Linux-PAM-0-75
Linux-PAM-0-76
Linux-PAM-0-77
Linux-PAM-0-78
Linux-PAM-0-78-Beta1
Linux-PAM-0-79
Linux-PAM-0-80
Linux-PAM-0_99_10_0
Linux-PAM-0_99_1_0
Linux-PAM-0_99_2_0
Linux-PAM-0_99_2_1
Linux-PAM-0_99_3_0
Linux-PAM-0_99_4_0
Linux-PAM-0_99_5_0
Linux-PAM-0_99_6_0
Linux-PAM-0_99_6_1
Linux-PAM-0_99_6_2
Linux-PAM-0_99_6_3
Linux-PAM-0_99_7_0
Linux-PAM-0_99_7_1
Linux-PAM-0_99_8_0
Linux-PAM-0_99_8_1
Linux-PAM-0_99_9_0
Linux-PAM-1_0_0
Linux-PAM-1_0_90
Linux-PAM-1_0_91
Linux-PAM-1_0_92
Linux-PAM-1_1-branch
Linux-PAM-1_1_0
Linux-PAM-1_1_1
Linux-PAM-1_1_2
Linux-PAM-1_1_3
Linux-PAM-1_1_4
Linux-PAM-1_1_5
Linux-PAM-1_1_7
Linux-PAM-1_1_8
Linux-PAM-1_2_0
Linux-PAM-1_2_1
before_automake
help
pam_unix_refactor
Linux-PAM-1.*
Linux-PAM-1.3.0
v1.*
v1.1.4
v1.1.6
v1.3.1
v1.4.0
v1.5.0
v1.5.1
v1.5.2
v1.5.3
v1.6.0
v1.6.1
v1.7.0
v1.7.1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-54411.json"