{"id":"CVE-2026-103531","aliases":["AZL-105342","CLSA-2026-1791470029","DEBIAN-CVE-2026-103531","EUVD-2026-90449","GHSA-m2qg-x6vj-xmrg","UBUNTU-CVE-2026-103531"],"status":"published","title":"OpenSC card-setcos.c setcos_construct_fci_44 stack-based overflow","description":"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.","severity":{"version":"4.0","score":5.1,"vector":"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/E:X","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00194,"percentile":0.09244,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119","CWE-121"],"published":"2026-10-01T00:45:15Z","modified":"2026-11-07T14:17:31Z","fixes":[{"ecosystem":"Azure Linux:3","package":"opensc","fixed_in":["0.27.1-3"],"sources":["osv"]},{"ecosystem":"TuxCare:AlmaLinux:9.6","package":"opensc","fixed_in":["0.23.0-5.el9.tuxcare.els7"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"opensc","fixed_in":["0.27.1-3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"opensc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.27.1-3"}]}]},{"source":"osv","ecosystem":"TuxCare:AlmaLinux:9.6","package":"opensc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.23.0-5.el9.tuxcare.els7"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"opensc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.23.0-0.3","0.23.0-0.3+deb12u1","0.23.0-0.3+deb12u2","0.23.0-1","0.23.0-2","0.24.0~rc1-1","0.25.0~rc1-1","0.25.1-1","0.25.1-2","0.25.1-2.1","0.26.0-1","0.26.1-1","0.26.1-2","0.26.1-3","0.27.0~rc1-1","0.27.0~rc2-1","0.27.1-1","0.27.1-2","0.27.1-3"]},{"source":"osv","ecosystem":"Debian:13","package":"opensc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.26.1-2","0.26.1-3","0.27.0~rc1-1","0.27.0~rc2-1","0.27.1-1","0.27.1-2","0.27.1-3"]},{"source":"osv","ecosystem":"Debian:14","package":"opensc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.27.1-3"}]}],"versions":["0.26.1-2","0.26.1-3","0.27.0~rc1-1","0.27.0~rc2-1","0.27.1-1","0.27.1-2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"opensc","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"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"opensc","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"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"opensc","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"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"opensc","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"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"opensc","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"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"opensc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.27.0~rc1-1","0.27.1-2","0.27.1-2ubuntu1","0.27.1-2ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"opensc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.26.1-3","0.26.1-3ubuntu1","0.27.0~rc1-1"]}],"products":[{"vendor":"opensc","product":"opensc"}],"references":[{"url":"https://vuldb.com/vuln/412343","tags":["vdb-entry","technical-description","advisory","report"]},{"url":"https://vuldb.com/vuln/412343/cti","tags":["signature","permissions-required","report"]},{"url":"https://vuldb.com/cve/CVE-2026-103531","tags":["third-party-advisory","advisory","report"]},{"url":"https://vuldb.com/submit/956910","tags":["third-party-advisory","advisory","report"]},{"url":"https://github.com/OpenSC/OpenSC/pull/3812","tags":["issue-tracking","patch","fix","report"]},{"url":"https://github.com/OpenSC/OpenSC/commit/ad730304052937c32b4eb489a06835ac6123632c","tags":["patch","fix","report"]},{"url":"https://github.com/OpenSC/OpenSC/","tags":["product","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103531","tags":["web","advisory"]},{"url":"https://github.com/OpenSC/OpenSC"},{"url":"https://github.com/advisories/GHSA-m2qg-x6vj-xmrg"},{"url":"https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1791470029.html","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103531.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-103531","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-103531","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-103531","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-103531","title":"OpenSC card-setcos.c setcos_construct_fci_44 stack-based overflow","description":"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.","status":"published","published":"2026-10-01T00:45:15.812Z","modified":"2026-10-05T23:57:51.416Z","cvss":[{"version":"4.0","score":5.1,"vector":"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/E:X","level":"medium","assessor":"cna"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C","level":"medium","assessor":"cna"},{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C","level":"medium","assessor":"cna"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P/E:ND/RL:OF/RC:C","assessor":"cna"}],"cwes":["CWE-121","CWE-119"],"updated_at":"2026-11-02T13:34:37.420074Z"}],"euvd":[{"id":"EUVD-2026-90449","description":"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.","status":"published","published":"2026-10-01T00:45:15Z","modified":"2026-10-05T23:57:51Z","cvss":[{"version":"4.0","score":5.1,"vector":"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/E:X","level":"medium"}],"updated_at":"2026-11-02T17:27:39.05741Z"}],"ghsa":[{"id":"GHSA-m2qg-x6vj-xmrg","title":"A flaw has been found in OpenSC up to 0.27.1. The impacted element is the function...","description":"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.","status":"published","published":"2026-10-01T03:31:13Z","modified":"2026-10-01T03:31:14Z","cvss":[{"version":"4.0","score":5.1,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T15:12:39.341866Z"}],"nvd":[{"id":"CVE-2026-103531","description":"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.","status":"published","published":"2026-10-01T01:16:35.963Z","modified":"2026-10-06T01:16:33.19Z","cvss":[{"version":"4.0","score":5.1,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"secondary"}],"cwes":["CWE-119","CWE-121"],"updated_at":"2026-11-02T14:12:53.097633Z"}],"osv":[{"id":"CVE-2026-103531","title":"OpenSC card-setcos.c setcos_construct_fci_44 stack-based overflow","description":"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.","status":"published","published":"2026-10-01T00:45:15.812Z","modified":"2026-10-28T10:41:00.969573254Z","cvss":[{"version":"4.0","score":5.1,"vector":"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/E:X","level":"medium"}],"cwes":["CWE-119","CWE-121"],"updated_at":"2026-11-02T15:44:54.236592Z"},{"id":"DEBIAN-CVE-2026-103531","description":"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.","status":"published","published":"2026-10-01T01:16:35.963Z","modified":"2026-10-10T05:00:08.107490045Z","cvss":[{"version":"4.0","score":5.1,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-02T15:45:48.903138Z"},{"id":"UBUNTU-CVE-2026-103531","description":"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.","status":"published","published":"2026-10-01T01:16:00Z","modified":"2026-10-17T12:57:58.422504999Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L","level":"medium"},{"version":"4.0","score":5.1,"vector":"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","level":"medium"}],"updated_at":"2026-11-02T16:55:59.130573Z"},{"id":"AZL-105342","title":"CVE-2026-103531 affecting package opensc for versions less than 0.27.1-3","description":"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.","status":"published","published":"2026-10-01T01:16:35Z","modified":"2026-11-07T14:17:31.187667295Z","updated_at":"2026-11-07T14:48:11.583685Z"},{"id":"CLSA-2026-1791470029","title":"opensc: Fix of CVE-2026-103531","description":"- CVE-2026-103531: stack buffer overflow in setcos_construct_fci_44() when\n  type, security or proprietary file attributes exceed 64 bytes","status":"published","published":"2026-10-09T06:53:08Z","modified":"2026-10-26T09:31:36.650434082Z","updated_at":"2026-11-02T15:43:49.016976Z"}]}}