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Red Hat CVE-2025-24531

MEDIUM
Return of Wrong Status Code (CWE-393)
2026-01-16 cve@mitre.org
Authentication Bypass Red Hat Suse
6.7
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-393
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V16 - Security Logging and Error Handling Return value error handling
Impact

CVSS 6.7 (MEDIUM). Attack vector: Local. Complexity: High. Privileges required: None. User interaction: None.
Exploit ScenarioDerived

An attacker could exploit this vulnerability to compromise the affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

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. [CVSS 6.7 MEDIUM]

RemediationAI

Monitor vendor advisories for a patch.

Affected ProductsAI

Product: In OpenSC pam_pkcs11. Versions: up to 0.6.13.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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Technical ContextAI · show details

Affects In OpenSC pam_pkcs11. 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.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 6.7 MEDIUM
AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
SUSE MEDIUM
Red Hat 6.7 MEDIUM

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

2
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
CVE Published
Jan 16, 2026 - 18:16 nvd
MEDIUM 6.7

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

Organizations using OpenSC pam_pkcs11 should be aware of notable risk from CVE-2025-24531 rated CVSS 6.7. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Moderate
Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score
0.0%
Top 100% exploitable
Data Quality
5 sources
Confidence: Medium
NVD CVE.org EPSS Vendor GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No

Priority Score

34
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +34
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Same weakness CWE-393 – Return of Wrong Status Code

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CVE-2020-5401 MEDIUM
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CVE-2025-32414 MEDIUM POC
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Same technique Authentication Bypass

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CVE-2011-3544 CRITICAL POC
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CVE-2022-40684 CRITICAL POC
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CVE-2024-0012 CRITICAL POC
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Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Server 16.0 Fixed
SUSE Linux Micro 6.0 Fixed
SUSE Linux Micro 6.1 Fixed
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed

References

Advisories & patches
ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:20130/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:20225/ REF http://www.openwall.com/lists/oss-security/2025/02/06/3 REF http://www.openwall.com/lists/oss-security/2025/02/06/7 REF https://github.com/OpenSC/pam_pkcs11/releases REF https://github.com/OpenSC/pam_pkcs11/security/advisories/GHSA-7mf6-rg36-qgch REF https://www.openwall.com/lists/oss-security/2025/02/06/3

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