CVE-2020-26571

Name: CVE-2020-26571
Creator: NVD / NIST
Published: 2020-10-06T02:15:13.067+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2020-26571 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. The gemsafe GPK smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in sc_pkcs15emu_gemsafeGPK_init.. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

Description

The gemsafe GPK smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in sc_pkcs15emu_gemsafeGPK_init.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.40%

31.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Opensc Project	Opensc	<= 0.20.0
Debian	Debian Linux	9.0
Fedoraproject	Fedora	33

References

http://www.openwall.com/lists/oss-security/2020/11/24/4Mailing List, Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20612Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/11/msg00027.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXOHFDMNMO6IDECAGUTB3SJGAGXVRT6S/
http://www.openwall.com/lists/oss-security/2020/11/24/4Mailing List, Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20612Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/11/msg00027.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXOHFDMNMO6IDECAGUTB3SJGAGXVRT6S/

Timeline

Published: Oct 6, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26571?

The gemsafe GPK smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in sc_pkcs15emu_gemsafeGPK_init.

How severe is CVE-2020-26571?

CVE-2020-26571 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26571?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-26571?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST