CVE-2026-40528

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Source
https://cve.org/CVERecord?id=CVE-2026-40528
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-40528.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-40528
Downstream
Related
Published
2026-05-29T13:38:11.831Z
Modified
2026-07-23T08:16:33.093592Z
Severity
  • 1.0 (Low) CVSS_V4 - 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 CVSS Calculator
Summary
OpenSC < 0.27.0 Buffer Overrun in do_key_value() via profile.c
Details

OpenSC before 0.27.0, fixed in commit 0358817, contains a stack and heap buffer overrun vulnerability in the dokeyvalue() 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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40528.json",
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-121",
        "CWE-122"
    ],
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "fixed": "0358817ec74aeca654f83e7709c7720b14c5db59"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/opensc/opensc

Affected ranges

Type
GIT
Repo
https://github.com/opensc/opensc
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
aca07679a6dd281ee6411f5e7de2ed0ee796bee8
Fixed
0358817ec74aeca654f83e7709c7720b14c5db59
Database specific 
{
    "cpe": "cpe:2.3:a:opensc_project:opensc:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.27.0"
        }
    ]
}

Affected versions

0.*
0.12.2
0.12.2-rc1
0.13.0
0.13.0pre1
0.13.0rc1
0.14.0
0.14.0rc2
0.14.0rtm
0.15.0
0.16.0
0.17.0
0.17.0-rc1
0.17.0-rc2
0.18.0
0.18.0-rc1
0.18.0-rc2
0.19.0
0.19.0-rc1
0.20.0
0.20.0-rc1
0.20.0-rc2
0.20.0-rc3
0.20.0-rc4
0.21.0
0.21.0-rc1
0.21.0-rc2
0.22.0
0.22.0-rc1
0.22.0-rc2
0.23.0
0.23.0-rc1
0.23.0-rc2
0.24.0
0.24.0-rc1
0.24.0-rc2
0.25.0
0.25.0-rc1
0.26.0
0.26.0-rc1
0.27.0-rc1
0.27.0-rc2
Other
tag-test
v0.*
v0.12.2
v0.16.0-pre1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-40528.json"
vanir_signatures_modified 
"2026-07-23T08:16:33Z"
vanir_signatures 
[
    {
        "digest": {
            "function_hash": "232499657068621503282061430363004536380",
            "length": 486.0
        },
        "source": "https://github.com/opensc/opensc/commit/0358817ec74aeca654f83e7709c7720b14c5db59",
        "signature_type": "Function",
        "signature_version": "v1",
        "id": "CVE-2026-40528-7e3ed371",
        "target": {
            "file": "src/pkcs15init/profile.c",
            "function": "do_key_value"
        },
        "deprecated": false
    },
    {
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "283131138558317224907081810785318560356",
                "278373350958975542287068350372565494830",
                "67470242920721080506956144928293937423",
                "196511876688390407994760463384734803440"
            ]
        },
        "source": "https://github.com/opensc/opensc/commit/0358817ec74aeca654f83e7709c7720b14c5db59",
        "signature_type": "Line",
        "signature_version": "v1",
        "id": "CVE-2026-40528-dc7e572f",
        "target": {
            "file": "src/pkcs15init/profile.c"
        },
        "deprecated": false
    }
]