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CVE-2019-20792

23
FAUCET Score

CVE-2019-20792 describes a double free vulnerability in OpenSC versions prior to 0.20.0, specifically within the coolkey_free_private_data function due to a missing uniqueness check in coolkey_add_object. This flaw affects the opensc_project opensc product. Rated as Medium severity with a CVSS score of 6.8, the vulnerability has a vector of AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating that physical access is required but could lead to high confidentiality, integrity, and availability impacts. There is currently no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.20.0CPE matchmatch criteria
cpe:2.3:a:opensc_project:opensc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.8MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.70%
Probability of exploitation in next 30 days
EPSS Percentile
49.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0070 is in the 88th percentile among its peer group of 1,530 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: opensc-0:0.20.0-2.el8
View patch

Vendor Advisories (1)

redhatCVE-2019-20792Moderate

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

Jan 4, 2020

References

bugs.chromium.org / p/oss-fuzz/issues/detail
ExploitThird Party Advisory
github.com / OpenSC/OpenSC/commit/c246f6f69a749d4f68626b40795a4f69168008f4
PatchThird Party Advisory
github.com / OpenSC/OpenSC/compare/0.19.0...0.20.0
Release NotesThird Party Advisory