What’s Vulnerable › Vulnerabilities

CVE-2025-13763: Libopensc: opensc: multiple uses of uninitialized variable

• Severity: medium (CVSS 5.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-23 · updated 2026-10-14
• Weakness: CWE-457

Description

Multiple uses of uninitialized variables were found in libopensc that may lead to information disclosure or application crash. An attack requires a crafted USB device or smart card that would present the system with specially crafted responses to the APDUs

Affected products

• OpenSC: before 0.27.0 — fixed in 0.27.0
• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions

How to fix

Upgrade to a fixed version: OpenSC 0.27.0. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2025-13763
• https://bugzilla.redhat.com/show_bug.cgi?id=2417581
• https://github.com/OpenSC/OpenSC/security/advisories/GHSA-2v44-fq35-98vv
• https://github.com/OpenSC/OpenSC/wiki/CVE-2025-13763
• https://github.com/OpenSC/OpenSC/security/advisories/GHSA-2v44-fq35-98vv

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