# CVE-2025-24531: libpam-pkcs11: In OpenSC pam_pkcs11 before 0.6.13, pam_sm_authenticate() wrongly returnsPAM_IGNORE in many error situations (such as...

CVE-2025-24531 is fixed in 2 products on 1 platform, first by libpam-pkcs11 0.6.12-2ubuntu0.24.10.1, released February 7, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-24531
- Priority: Routine
- CVSS: 6.7 (High)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 6, 2025

## Description

In OpenSC pam_pkcs11 before 0.6.13, pam_sm_authenticate() wrongly returnsPAM_IGNORE in many error situations (such as an error triggered by asmartcard before login), allowing authentication bypass.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libpam-pkcs11 Ubuntu 24.04.5 LTS (noble) | 0.6.12-2ubuntu0.24.04.1 | [libpam-pkcs11 0.6.12-2ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libpam-pkcs11-0.6.12-2ubuntu0.24.04.1.md) | Feb 10, 2025 |
| Linux | libpam-pkcs11 Ubuntu 24.10 (oracular) | 0.6.12-2ubuntu0.24.10.1 | [libpam-pkcs11 0.6.12-2ubuntu0.24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libpam-pkcs11-0.6.12-2ubuntu0.24.10.1.md) | Feb 7, 2025 |
| Linux | pam-pkcs11 Debian 12.15 (bookworm) | 0.6.12-1+deb12u1 | [DEBIAN-CVE-2025-24531](https://patchblox.com/security/data/fix/linux/debian-cve-2025-24531.md) | Jan 16, 2026 |
| Linux | pam-pkcs11 Debian 13.5 (trixie) | 0.6.13-1 | [DEBIAN-CVE-2025-24531](https://patchblox.com/security/data/fix/linux/debian-cve-2025-24531.md) | Jan 16, 2026 |
| Linux | pam-pkcs11 Debian 14 | 0.6.13-1 | [DEBIAN-CVE-2025-24531](https://patchblox.com/security/data/fix/linux/debian-cve-2025-24531.md) | Jan 16, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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