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Fencer Vulns
medium 6.8

CVE-2019-20792 json

OpenSC before 0.20.0 has a double free in coolkey_free_private_data because coolkey_add_object in libopensc/card-coolkey.c lacks a uniquene…

published 2020-04-29 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-11329

cvss
6.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

OpenSC before 0.20.0 has a double free in coolkey_free_private_data because coolkey_add_object in libopensc/card-coolkey.c lacks a uniqueness check.

Patch / fix

  • opensc_project opensc 0.20.0
  • opensc Debian 14, Debian 13, Debian 12 0.20.0-1

debian advisories DEBIAN-CVE-2019-20792

  • opensc RHEL 8 0.20.0-2.el8

red hat advisories RHSA-2020:4483

  • opensc SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 0.18.0-150000.3.23.1
  • opensc SLE Module for Basesystem 15 SP2 0.19.0-3.7.1

suse advisories SUSE-SU-2022:1041-1SUSE-SU-2021:1168-1

  • opensc openSUSE Tumbleweed 0.22.0-3.1
  • opensc openSUSE Leap 15.2 0.19.0-lp152.3.3.1

opensuse advisories openSUSE-SU-2024:11643-1openSUSE-SU-2021:0565-1

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-2019-20792 updated cvss 6.4

opensc: Double free in coolkey_free_private_data in libopensc/card-coolkey.c

  • Red Hat Enterprise Linux BaseOS (v. 8) opensc 0.20.0-2.el8
    fixed: vendor fix RHSA-2020:4483
  • Red Hat Enterprise Linux 7 opensc
    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

Exploit prediction

0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugs.chromium.org https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19208 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.8 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

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.