What is CVE-2025-24531?

CVE-2025-24531 is a medium-severity vulnerability in Opensc Project Pam_pkcs11, classified under CWE-393. CVSS score: 6.7/10. Published 2026-01-16.

How severe is CVE-2025-24531?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Is CVE-2025-24531 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Opensc Project Pam_pkcs11

CVE-2025-24531

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

EPSS: 0.000 (0.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Opensc Project Pam_pkcs11 — versions 0.6.12

Weakness classification (CWE)

CWE-393

Public proof-of-concept exploits

w4zu/Debian_

References

Frequently asked questions

What is CVE-2025-24531?: CVE-2025-24531 is a medium-severity vulnerability in Opensc Project Pam_pkcs11, classified under CWE-393. CVSS score: 6.7/10. Published 2026-01-16.
How severe is CVE-2025-24531?: Medium severity. CVSS v3 base score is 6.7 out of 10.
Is CVE-2025-24531 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.