It was discovered that some OpenSC smart card drivers mishandled memory when performing certain decoding operations. An attacker could possibly use this issue to cause a denial of service or other unspecified impact. This issue only affected Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2019-15945, CVE-2019-15946)
It was discovered that some OpenSC smart card drivers had buffer overflow vulnerabilities. An attacker could possibly use this issue to cause a denial of service or other unspecified impact. (CVE-2020-26570, CVE-2020-26571, CVE-2020-26572)