OpenSC < 0.27.0 Buffer Overrun in do_key_value() via profile.c_CVE-2026-40528

{
    "lastseen": "",
    "description": "OpenSC before 0.27.0, fixed in commit 0358817, contains a stack and heap buffer overrun vulnerability in the do_key_value() function in src/pkcs15init/profile.c that allows attackers to corrupt memory by supplying a crafted profile configuration file. During pkcs15-init invocation, a key value entry beginning with '=' followed by more than sizeof(keybuf) characters is copied into keybuf via memcpy without a length check, causing both stack and heap buffer overruns.",
    "published": "2026-05-29T13:38:11.831Z",
    "modified": "2026-05-29T13:38:11.831Z",
    "type": "cve",
    "title": "OpenSC < 0.27.0 Buffer Overrun in do_key_value() via profile.c",
    "source": "VulnCheck",
    "references": "https://github.com/OpenSC/OpenSC/commit/0358817ec74aeca654f83e7709c7720b14c5db59\nhttps://www.vulncheck.com/advisories/opensc-buffer-overrun-in-do-key-value-via-profile-c",
    "id": "CVE-2026-40528",
    "bulletinFamily": "",
    "cwe": [
        "CWE-121",
        "CWE-122"
    ],
    "cvelist": null,
    "sourceData": "OpenSC OpenSC 0\nOpenSC OpenSC 0",
    "sourceHref": "",
    "cvss": {
        "score": 1,
        "severity": "LOW",
        "vector": "CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "OpenSC",
    "version": "0",
    "vendor": "OpenSC",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}