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Vulnerability · Published Apr 23, 2026 · Assigned by redhat

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

Medium 5.7

In plain English

A medium-severity security flaw in OpenSC from OpenSC. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.7Medium
Exploit odds (30 days)0.3%top 81.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12openscno fix listedDEBIAN-CVE-2025-13763
Debian:13openscno fix listedDEBIAN-CVE-2025-13763
Debian:14opensc0.27.0~rc1-1DEBIAN-CVE-2025-13763
Ubuntu:25.10openscno fix listedUBUNTU-CVE-2025-13763
Ubuntu:26.04:LTSopenscno fix listedUBUNTU-CVE-2025-13763
Ubuntu:26.10openscno fix listedUBUNTU-CVE-2025-13763

Affected products (as reported)

VendorProductVersions
OpenSC OpenSC 0 – before 0.27.0
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references

Weakness: CWE-457 · Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

References