CVE-2019-20792

Exp

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.

Published: 2020-04-29 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-20792 is rated Exploit Available (59.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.70%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2019-20792

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-20792

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.17% 0.70% +0.54%
2 2025-11-21 0.11% 0.17% +0.05%
3 2025-11-18 — 0.11% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-20792

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 3.1 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.9 5.9 [email protected]
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2019-20792

OS Trackers for CVE-2019-20792

vendor priority summary link
alpine medium CVE-2019-20792: 1 source package rows (opensc); 2 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 2. https://security.alpinelinux.org/vuln/CVE-2019-20792
debian low CVE-2019-20792 low priority: Debian including 1 source packages (opensc), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-20792
redhat medium — https://access.redhat.com/security/cve/CVE-2019-20792
suse medium CVE-2019-20792 severity moderate: SUSE including 21 source package names (libopensc2, libopensc2-32bit, …), 53 product×package rows across 42 product lines (SUSE Liberty Linux 8, SUSE Linux Enterprise High Performance Computing 12 SP4, … (42 product lines)): Known Not Affected 29, Fixed 24. https://www.suse.com/security/cve/CVE-2019-20792/
ubuntu low CVE-2019-20792 low priority: Ubuntu including 1 source packages (opensc), 17 status rows across 17 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 13, DNE 1, ignored 1, needed 1, released 1. https://ubuntu.com/security/CVE-2019-20792

Affected software / configurations for CVE-2019-20792

Vendor Product Version Raw CPE
opensc_project opensc < 0.20.0 cpe:2.3:a:opensc_project:opensc:*:*:*:*:*:*:*:*

References for CVE-2019-20792

cvelogic Threat Intelligence