What’s Vulnerable › Vulnerabilities

CVE-2019-20792

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-04-29 · updated 2026-06-17
• Weakness: CWE-415

Description

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.

Affected products

• OpenSC: before 0.20.0 — fixed in 0.20.0

How to fix

Upgrade to a fixed version: OpenSC 0.20.0. Check the vendor advisory for mitigations.

References

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19208
• https://github.com/OpenSC/OpenSC/commit/c246f6f69a749d4f68626b40795a4f69168008f4
• https://github.com/OpenSC/OpenSC/compare/0.19.0...0.20.0
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19208
• https://github.com/OpenSC/OpenSC/commit/c246f6f69a749d4f68626b40795a4f69168008f4
• https://github.com/OpenSC/OpenSC/compare/0.19.0...0.20.0

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