CVE catalog
CVE-2026-54411
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 netw
- Severity
- Medium · CVSS 6.9
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.32% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | pam | sid | 1.7.0-8 | vulnerable |
| Debian | pam | forky | 1.7.0-8 | vulnerable |
| Debian | pam | trixie | 1.7.0-5 | vulnerable |
| Debian | pam | bookworm | 1.5.2-6+deb12u2 | vulnerable |
| Cpe | pam | Not reported | Not reported | vulnerable |
| Ubuntu | pam | noble | 1.5.3-5ubuntu5.6 | fixed |
| Ubuntu | libpam-doc | noble | 1.5.3-5ubuntu5.6 | fixed |
| Ubuntu | libpam-modules | noble | 1.5.3-5ubuntu5.6 | fixed |
| Ubuntu | libpam-modules-bin | noble | 1.5.3-5ubuntu5.6 | fixed |
| Ubuntu | libpam-runtime | noble | 1.5.3-5ubuntu5.6 | fixed |
| Ubuntu | libpam0g | noble | 1.5.3-5ubuntu5.6 | fixed |
| Ubuntu | libpam0g-dev | noble | 1.5.3-5ubuntu5.6 | fixed |
| Ubuntu | pam | pro | 1.3.1-5ubuntu1 | vulnerable |
| Ubuntu | pam | pro | 1.3.1-5ubuntu3 | vulnerable |
| Ubuntu | pam | pro | 1.3.1-5ubuntu4 | vulnerable |
| Ubuntu | pam | pro | 1.3.1-5ubuntu4.1 | vulnerable |
| Ubuntu | pam | pro | 1.3.1-5ubuntu4.2 | vulnerable |
| Ubuntu | pam | pro | 1.3.1-5ubuntu4.3 | vulnerable |
| Ubuntu | pam | pro | 1.3.1-5ubuntu4.4 | vulnerable |
| Ubuntu | pam | pro | 1.3.1-5ubuntu4.6 | vulnerable |
| Ubuntu | pam | pro | 1.3.1-5ubuntu4.7 | vulnerable |
| Ubuntu | pam | pro | 1.3.1-5ubuntu4.7+esm1 | vulnerable |
| Ubuntu | pam | 22.04 | 1.3.1-5ubuntu11 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-10ubuntu1 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-10ubuntu2 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu1 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2.1 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2.3 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2.4 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2.5 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2.6 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2.7 | fixed |
| Ubuntu | pam | 24.04 | 1.5.2-6ubuntu1 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.2-9.1ubuntu1 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.2-9.1ubuntu2 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.2-9.1ubuntu3 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu3 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu4 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu5 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu5.1 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu5.4 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu5.5 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu5.6 | fixed |
| Ubuntu | pam | 25.10 | 1.5.3-7ubuntu4 | vulnerable |
| Ubuntu | pam | 25.10 | 1.5.3-7ubuntu5 | vulnerable |
| Ubuntu | pam | 25.10 | 1.5.3-7ubuntu6 | vulnerable |
| Ubuntu | pam | 25.10 | 1.7.0-5ubuntu1 | vulnerable |
| Ubuntu | pam | 25.10 | 1.7.0-5ubuntu2 | vulnerable |
| Ubuntu | pam | 26.04 | 1.7.0-5ubuntu2 | vulnerable |
| Ubuntu | pam | 26.04 | 1.7.0-5ubuntu3 | vulnerable |
| Ubuntu | pam | 26.04 | 1.7.0-5ubuntu3.1 | fixed |
| Suse | pam | linux micro 6.1 | 1.6.1-slfo.1.1_5.1 | fixed |
| Suse | pam | linux micro 6.0 | 1.6.0-6.1 | fixed |
| Ubuntu | pam | 22.04 | 1.3.1-5ubuntu11 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-10ubuntu1 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-10ubuntu2 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu1 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2.1 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2.3 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2.4 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2.5 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2.6 | vulnerable |
| Ubuntu | pam | 22.04 | 1.4.0-11ubuntu2.7 | fixed |
| Ubuntu | pam | 24.04 | 1.5.2-6ubuntu1 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.2-9.1ubuntu1 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.2-9.1ubuntu2 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.2-9.1ubuntu3 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu3 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu4 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu5 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu5.1 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu5.4 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu5.5 | vulnerable |
| Ubuntu | pam | 24.04 | 1.5.3-5ubuntu5.6 | fixed |
| Ubuntu | pam | 26.04 | 1.7.0-5ubuntu2 | vulnerable |
| Ubuntu | pam | 26.04 | 1.7.0-5ubuntu3 | vulnerable |
| Ubuntu | pam | 26.04 | 1.7.0-5ubuntu3.1 | fixed |
| Suse | pam | linux enterprise server ltss extended security 12 sp5 | 1.1.8-24.80.1 | fixed |
| Suse | pam | linux enterprise micro 5.3 | 1.3.0-150000.6.89.1 | fixed |
| Suse | pam | linux enterprise micro 5.4 | 1.3.0-150000.6.89.1 | fixed |
| Suse | pam | linux enterprise micro 5.5 | 1.3.0-150000.6.89.1 | fixed |
| Suse | pam | linux enterprise module for basesystem 15 sp7 | 1.3.0-150000.6.89.1 | fixed |
| Suse | pam | linux enterprise module for development tools 15 sp7 | 1.3.0-150000.6.89.1 | fixed |
| Suse | pam | linux enterprise server 16.0 | 1.7.1-160000.5.1 | fixed |
| Suse | pam-full-src | linux enterprise server 16.0 | 1.7.1-160000.5.1 | fixed |
| Suse | pam | linux enterprise server for sap applications 16.0 | 1.7.1-160000.5.1 | fixed |
| Suse | pam-full-src | linux enterprise server for sap applications 16.0 | 1.7.1-160000.5.1 | fixed |
| Suse | pam | linux micro 6.2 | 1.7.1-160000.5.1 | fixed |
| Suse | pam-full-src | linux micro 6.2 | 1.7.1-160000.5.1 | fixed |
| Opensuse | pam | leap 16.0 | 1.7.1-160000.5.1 | fixed |
| Opensuse | pam-full-src | leap 16.0 | 1.7.1-160000.5.1 | fixed |
| Opensuse | pam | tumbleweed | 1.7.2+git12-2.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | pam | source | sid | (unfixed) | not yet assigned | Not reported | [1140190] |
| Debian | pam | source | forky | (unfixed) | not yet assigned | Not reported | [1140190] |
| Debian | pam | source | trixie | (unfixed) | not yet assigned | Not reported | [1140190] |
| Debian | pam | source | bookworm | (unfixed) | not yet assigned | Not reported | [1140190] |
| Ubuntu | pam | deb | noble | 1.5.3-5ubuntu5.6 | Not reported | Not reported | Not reported |
| Ubuntu | libpam-doc | deb | noble | 1.5.3-5ubuntu5.6 | Not reported | Not reported | Not reported |
| Ubuntu | libpam-modules | deb | noble | 1.5.3-5ubuntu5.6 | Not reported | Not reported | Not reported |
| Ubuntu | libpam-modules-bin | deb | noble | 1.5.3-5ubuntu5.6 | Not reported | Not reported | Not reported |
| Ubuntu | libpam-runtime | deb | noble | 1.5.3-5ubuntu5.6 | Not reported | Not reported | Not reported |
| Ubuntu | libpam0g | deb | noble | 1.5.3-5ubuntu5.6 | Not reported | Not reported | Not reported |
| Ubuntu | libpam0g-dev | deb | noble | 1.5.3-5ubuntu5.6 | Not reported | Not reported | Not reported |
| Ubuntu | pam | deb | 22.04 | 1.4.0-11ubuntu2.7 | Not reported | UBUNTU-CVE-2026-54411 | Not reported |
| Ubuntu | pam | deb | 24.04 | 1.5.3-5ubuntu5.6 | Not reported | UBUNTU-CVE-2026-54411 | Not reported |
| Ubuntu | pam | deb | 26.04 | 1.7.0-5ubuntu3.1 | Not reported | UBUNTU-CVE-2026-54411 | Not reported |
| Suse | pam | rpm | linux micro 6.1 | 1.6.1-slfo.1.1_5.1 | Not reported | SUSE-SU-2026:22896-1 | Not reported |
| Suse | pam | rpm | linux micro 6.0 | 1.6.0-6.1 | Not reported | SUSE-SU-2026:22807-1 | Not reported |
| Ubuntu | pam | deb | 22.04 | 1.4.0-11ubuntu2.7 | Not reported | USN-8601-1 | Not reported |
| Ubuntu | pam | deb | 24.04 | 1.5.3-5ubuntu5.6 | Not reported | USN-8601-1 | Not reported |
| Ubuntu | pam | deb | 26.04 | 1.7.0-5ubuntu3.1 | Not reported | USN-8601-1 | Not reported |
| Suse | pam | rpm | linux enterprise server ltss extended security 12 sp5 | 1.1.8-24.80.1 | Not reported | SUSE-SU-2026:3162-1 | Not reported |
| Suse | pam | rpm | linux enterprise micro 5.3 | 1.3.0-150000.6.89.1 | Not reported | SUSE-SU-2026:3163-1 | Not reported |
| Suse | pam | rpm | linux enterprise micro 5.4 | 1.3.0-150000.6.89.1 | Not reported | SUSE-SU-2026:3163-1 | Not reported |
| Suse | pam | rpm | linux enterprise micro 5.5 | 1.3.0-150000.6.89.1 | Not reported | SUSE-SU-2026:3163-1 | Not reported |
| Suse | pam | rpm | linux enterprise module for basesystem 15 sp7 | 1.3.0-150000.6.89.1 | Not reported | SUSE-SU-2026:3163-1 | Not reported |
| Suse | pam | rpm | linux enterprise module for development tools 15 sp7 | 1.3.0-150000.6.89.1 | Not reported | SUSE-SU-2026:3163-1 | Not reported |
| Suse | pam | rpm | linux enterprise server 16.0 | 1.7.1-160000.5.1 | Not reported | SUSE-SU-2026:22639-1 | Not reported |
| Suse | pam-full-src | rpm | linux enterprise server 16.0 | 1.7.1-160000.5.1 | Not reported | SUSE-SU-2026:22639-1 | Not reported |
| Suse | pam | rpm | linux enterprise server for sap applications 16.0 | 1.7.1-160000.5.1 | Not reported | SUSE-SU-2026:22639-1 | Not reported |
| Suse | pam-full-src | rpm | linux enterprise server for sap applications 16.0 | 1.7.1-160000.5.1 | Not reported | SUSE-SU-2026:22639-1 | Not reported |
| Suse | pam | rpm | linux micro 6.2 | 1.7.1-160000.5.1 | Not reported | SUSE-SU-2026:22599-1 | Not reported |
| Suse | pam-full-src | rpm | linux micro 6.2 | 1.7.1-160000.5.1 | Not reported | SUSE-SU-2026:22599-1 | Not reported |
| Opensuse | pam | rpm | leap 16.0 | 1.7.1-160000.5.1 | Not reported | OPENSUSE-SU-2026:21320-1 | Not reported |
| Opensuse | pam-full-src | rpm | leap 16.0 | 1.7.1-160000.5.1 | Not reported | OPENSUSE-SU-2026:21320-1 | Not reported |
| Opensuse | pam | rpm | tumbleweed | 1.7.2+git12-2.1 | Not reported | OPENSUSE-SU-2026:11201-1 | Not reported |
Notes
[trixie] pam: Minor issue [bookworm] pam: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libpam0g]Affected
Source package: [pam]
Details (2)
1.5.2-6+deb12u2· amd64 · bookwormAffected
nvd · pam · debian · bookworm; nvd · pam · debian · 12
1.5.2-6+deb12u2· arm64 · bookwormAffected
nvd · pam · debian · bookworm; nvd · pam · debian · 12
- [libpam0g-dev]Affected
Source package: [pam]
Details (2)
1.5.2-6+deb12u2· amd64 · bookwormAffected
nvd · pam · debian · bookworm; nvd · pam · debian · 12
1.5.2-6+deb12u2· arm64 · bookwormAffected
nvd · pam · debian · bookworm; nvd · pam · debian · 12
- [libpam-doc]Affected
Source package: [pam]
Details (2)
1.5.2-6+deb12u2· all · bookwormAffected
nvd · pam · debian · bookworm; nvd · pam · debian · 12
1.5.2-6+deb12u2· all · bookwormAffected
nvd · pam · debian · bookworm; nvd · pam · debian · 12
- [libpam-modules]Affected
Source package: [pam]
Details (2)
1.5.2-6+deb12u2· amd64 · bookwormAffected
nvd · pam · debian · bookworm; nvd · pam · debian · 12
1.5.2-6+deb12u2· arm64 · bookwormAffected
nvd · pam · debian · bookworm; nvd · pam · debian · 12
- [libpam-modules-bin]Affected
Source package: [pam]
Details (2)
1.5.2-6+deb12u2· amd64 · bookwormAffected
nvd · pam · debian · bookworm; nvd · pam · debian · 12
1.5.2-6+deb12u2· arm64 · bookwormAffected
nvd · pam · debian · bookworm; nvd · pam · debian · 12
- [libpam-runtime]Affected
Source package: [pam]
Details (2)
1.5.2-6+deb12u2· all · bookwormAffected
nvd · pam · debian · bookworm; nvd · pam · debian · 12
1.5.2-6+deb12u2· all · bookwormAffected
nvd · pam · debian · bookworm; nvd · pam · debian · 12
[Debian 13 (Trixie)]
- [libpam0g]Affected
Source package: [pam]
Details (2)
1.7.0-5· amd64 · trixieAffected
nvd · pam · debian · 13
1.7.0-5· arm64 · trixieAffected
nvd · pam · debian · 13
- [libpam0g-dev]Affected
Source package: [pam]
Details (2)
1.7.0-5· amd64 · trixieAffected
nvd · pam · debian · 13
1.7.0-5· arm64 · trixieAffected
nvd · pam · debian · 13
- [libpam-doc]Affected
Source package: [pam]
Details (2)
1.7.0-5· all · trixieAffected
nvd · pam · debian · 13
1.7.0-5· all · trixieAffected
nvd · pam · debian · 13
- [libpam-modules]Affected
Source package: [pam]
Details (2)
1.7.0-5· amd64 · trixieAffected
nvd · pam · debian · 13
1.7.0-5· arm64 · trixieAffected
nvd · pam · debian · 13
- [libpam-modules-bin]Affected
Source package: [pam]
Details (2)
1.7.0-5· amd64 · trixieAffected
nvd · pam · debian · 13
1.7.0-5· arm64 · trixieAffected
nvd · pam · debian · 13
- [libpam-runtime]Affected
Source package: [pam]
Details (2)
1.7.0-5· all · trixieAffected
nvd · pam · debian · 13
1.7.0-5· all · trixieAffected
nvd · pam · debian · 13
[openSUSE Tumbleweed]
- [pam-32bit]Unknown
Source package: [pam]
Details (1)
1.7.2+git48-1.1· x86_64 · tumbleweedUnknown · Fixed:
1.7.2+git12-2.1Version impact unknown
nvd · pam · opensuse · tumbleweed
- [pam-devel]Unknown
Source package: [pam]
Details (1)
1.7.2+git48-1.1· x86_64 · tumbleweedUnknown · Fixed:
1.7.2+git12-2.1Version impact unknown
nvd · pam · opensuse · tumbleweed
- [pam-devel-32bit]Unknown
Source package: [pam]
Details (1)
1.7.2+git48-1.1· x86_64 · tumbleweedUnknown · Fixed:
1.7.2+git12-2.1Version impact unknown
nvd · pam · opensuse · tumbleweed
- [pam]Fixed
Source package: [pam]
Details (1)
1.7.2+git48-1.1· x86_64 · tumbleweedFixed · Fixed:
1.7.2+git12-2.1nvd · pam · opensuse · tumbleweed
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11201-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-54411]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-54411]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22599-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22639-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22807-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22896-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3162-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3163-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-54411]
- [https://osv.dev/vulnerability/USN-8601-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11201-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:21320-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-54411]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54411.json]
- [https://ubuntu.com/security/notices/USN-8601-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2913.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]