CVE-2020-26570 Memory corruption in n/a

What is CVE-2020-26570?

CVE-2020-26570 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 6 Oct 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The Oberthur smart card software driver in OpenSC before 0.21.0-rc1 has a heap-based buffer overflow in sc_oberthur_read_file.

Weakness: CWE-787

Which versions are affected by CVE-2020-26570?

It affects 3 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Opensc Project Opensc.

How do I fix CVE-2020-26570?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-26570 being exploited?

There is no known exploitation of CVE-2020-26570 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-6772, DEBIAN-CVE-2020-26570, GHSA-547v-83cc-5hqg, OESA-2021-1021, UBUNTU-CVE-2020-26570.