{"id":"UBUNTU-CVE-2026-103531","details":"A flaw has been found in OpenSC up to 0.27.1. The impacted element is the function setcos_construct_fci_44 of the file src/libopensc/card-setcos.c. Executing a manipulation of the argument type_attr can lead to stack-based buffer overflow. The attack can be launched remotely. This patch is called ad730304052937c32b4eb489a06835ac6123632c. It is best practice to apply a patch to resolve this issue.","modified":"2026-10-02T22:30:16.512015114Z","published":"2026-10-02T00:00:00Z","upstream":["CVE-2026-103531"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-103531"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-103531"},{"type":"REPORT","url":"https://github.com/OpenSC/OpenSC/pull/3812"},{"type":"REPORT","url":"https://github.com/OpenSC/OpenSC/"},{"type":"REPORT","url":"https://github.com/OpenSC/OpenSC/commit/ad730304052937c32b4eb489a06835ac6123632c"},{"type":"REPORT","url":"https://vuldb.com/cve/CVE-2026-103531"},{"type":"REPORT","url":"https://vuldb.com/submit/956910"},{"type":"REPORT","url":"https://vuldb.com/vuln/412343"},{"type":"REPORT","url":"https://vuldb.com/vuln/412343/cti"}],"affected":[{"package":{"name":"opensc","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/opensc?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.15.0-1ubuntu1","0.15.0-1ubuntu1+esm1","0.15.0-1ubuntu1+esm2","0.15.0-1ubuntu1+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"opensc","binary_version":"0.15.0-1ubuntu1+esm3"},{"binary_name":"opensc-pkcs11","binary_version":"0.15.0-1ubuntu1+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103531.json"}},{"package":{"name":"opensc","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/opensc?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.17.0-1","0.17.0-2","0.17.0-2build1","0.17.0-3","0.17.0-3ubuntu0.1~esm1","0.17.0-3ubuntu0.1~esm2","0.17.0-3ubuntu0.1~esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"opensc","binary_version":"0.17.0-3ubuntu0.1~esm3"},{"binary_name":"opensc-pkcs11","binary_version":"0.17.0-3ubuntu0.1~esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103531.json"}},{"package":{"name":"opensc","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/opensc?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.19.0-2","0.20.0-1","0.20.0-2","0.20.0-3","0.20.0-3ubuntu0.1~esm1","0.20.0-3ubuntu0.1~esm2","0.20.0-3ubuntu0.1~esm3","0.20.0-3ubuntu0.1~esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"opensc","binary_version":"0.20.0-3ubuntu0.1~esm4"},{"binary_name":"opensc-pkcs11","binary_version":"0.20.0-3ubuntu0.1~esm4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103531.json"}},{"package":{"name":"opensc","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/opensc?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.21.0-1ubuntu1","0.22.0-1ubuntu2","0.22.0-1ubuntu2+esm1","0.22.0-1ubuntu2.1","0.22.0-1ubuntu2.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"opensc","binary_version":"0.22.0-1ubuntu2.1+esm1"},{"binary_name":"opensc-pkcs11","binary_version":"0.22.0-1ubuntu2.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103531.json"}},{"package":{"name":"opensc","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/opensc?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.23.0-1ubuntu4","0.24.0~rc1-1","0.25.0~rc1-1","0.25.0~rc1-1build1","0.25.0~rc1-1build2","0.25.0~rc1-1ubuntu0.1~esm1","0.25.0~rc1-1ubuntu0.1","0.25.0~rc1-1ubuntu0.2","0.25.0~rc1-1ubuntu0.2+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.25.0~rc1-1ubuntu0.2+esm1","binary_name":"opensc"},{"binary_version":"0.25.0~rc1-1ubuntu0.2+esm1","binary_name":"opensc-pkcs11"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103531.json"}},{"package":{"name":"opensc","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/opensc?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.26.1-3","0.26.1-3ubuntu1","0.27.0~rc1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"opensc","binary_version":"0.27.0~rc1-1"},{"binary_name":"opensc-pkcs11","binary_version":"0.27.0~rc1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103531.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}