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Fencer Vulns
medium 5.7

CVE-2025-13763 json

Libopensc: opensc: multiple uses of uninitialized variable

published 2026-04-23 6 mo ago modified 2026-11-06 3 d ago also EUVD-2025-209564

cvss
5.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits
0
none known

Summary

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

Patch / fix

  • OpenSC OpenSC 0.27.0
  • opensc Debian 14 0.27.0~rc1-1

debian advisories DEBIAN-CVE-2025-13763

  • opensc openSUSE Tumbleweed 0.27.1-1.1

opensuse advisories openSUSE-SU-2026:10475-1

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-2025-13763 updated cvss 5.7

libopensc: opensc: Multiple uses of uninitialized variable

  • Red Hat Enterprise Linux 7 opensc Red Hat Enterprise Linux 8 opensc Red Hat Enterprise Linux 9 opensc Red Hat Enterprise Linux 10 opensc
    affected: workaround, no fix available “Fix deferred”

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
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/OpenSC/OpenSC/security/advisories/GHSA-2v44-fq35-98vv referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.7 CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

  • OpenSC OpenSC
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-457 Use of Uninitialized Variable

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.