MediumFix available
opensc — security advisory
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.
- Products
- opensc
- Affected 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
- Fixed versions
- 0.27.1-3
- CVEs
- CVE-2026-103531
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 13:31 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2026-103531
opensc
Fixed versions: Not specified
opensc
Fixed versions: Not specified
opensc
Fixed versions: 0.27.1-3
Complete source record
{
"id": "32ee4d7049155bfa832c284c6c88218b7c4c84b51f01b2c79013063660b0a4e2",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-103531",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-103531",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2026-103531",
"products": [
{
"name": {
"value": "opensc",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.23.0-0.3",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.0-0.3+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.0-0.3+deb12u2",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.24.0~rc1-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.25.0~rc1-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.25.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.25.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.25.1-2.1",
"evidence": "/affected/0/versions"
},
{
"value": "0.26.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.26.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.26.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.26.1-3",
"evidence": "/affected/0/versions"
},
{
"value": "0.27.0~rc1-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.27.0~rc2-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.27.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.27.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.27.1-3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "opensc",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.26.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "0.26.1-3",
"evidence": "/affected/1/versions"
},
{
"value": "0.27.0~rc1-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.27.0~rc2-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.27.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.27.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "0.27.1-3",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "opensc",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.27.1-3",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "0.26.1-2",
"evidence": "/affected/2/versions"
},
{
"value": "0.26.1-3",
"evidence": "/affected/2/versions"
},
{
"value": "0.27.0~rc1-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.27.0~rc2-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.27.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.27.1-2",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-103531",
"aliases": [
"DEBIAN-CVE-2026-103531"
],
"metrics": [
{
"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/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"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "opensc",
"purl": "pkg:deb/debian/opensc?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-103531.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "opensc",
"purl": "pkg:deb/debian/opensc?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-103531.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.27.1-3"
}
]
}
],
"package": {
"name": "opensc",
"purl": "pkg:deb/debian/opensc?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-103531.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-10T05:00:08.107490045Z",
"provider": "osv",
"upstream": [
"CVE-2026-103531"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-103531"
]
},
"related_cves": [
{
"value": "CVE-2026-103531",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 125986,
"published_at": "2026-10-01T01:16:35.963+00:00"
}