Skip to content
Fencer Vulns
medium 6.7

CVE-2025-24531 json

In OpenSC pam_pkcs11 before 0.6.13, pam_sm_authenticate() wrongly returns PAM_IGNORE in many error situations (such as an error triggered b…

published 2026-01-16 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-206298

cvss
6.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

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.

Patch / fix

  • OpenSC project pam_pkcs11 0.6.13
  • pam-pkcs11 Debian 12 0.6.12-1+deb12u1
  • pam-pkcs11 Debian 14, Debian 13 0.6.13-1

debian advisories DEBIAN-CVE-2025-24531

  • pam-pkcs11 Ubuntu 24.04 LTS 0.6.12-2ubuntu0.24.04.1

ubuntu advisories UBUNTU-CVE-2025-24531

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • pam_pkcs11 Linux Micro 6.1 0.6.12-slfo.1.1_3.1
  • pam_pkcs11 Linux Micro 6.0 0.6.12-2.1

suse advisories SUSE-SU-2025:20225-1SUSE-SU-2025:20130-1

  • pam_pkcs11 openSUSE Tumbleweed 0.6.13-1.1

opensuse advisories openSUSE-SU-2025:14738-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-24531 updated cvss 6.7

pam_pkcs11: authentication bypass in error situations

  • Red Hat Enterprise Linux 6 pam_pkcs11 Red Hat Enterprise Linux 7 pam_pkcs11
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
9 mo ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.7 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

Classification

Weakness
  • CWE-393 Return of Wrong Status Code

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.