CVE-2025-66038

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Source
https://cve.org/CVERecord?id=CVE-2025-66038
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-66038.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-66038
Aliases
  • GHSA-72x5-fwjx-2459
Downstream
Related
Published
2026-03-30T17:03:55.914Z
Modified
2026-07-01T09:59:09.483581071Z
Severity
  • 3.9 (Low) CVSS_V3 - CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
Summary
OpenSC: `sc_compacttlv_find_tag` can return out-of-bounds pointers
Details

OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, sccompacttlvfindtag searches a compact-TLV buffer for a given tag. In compact-TLV, a single byte encodes the tag (high nibble) and value length (low nibble). With a 1-byte buffer {0x0A}, the encoded element claims tag=0 and length=10 but no value bytes follow. Calling sccompacttlvfindtag with search tag 0x00 returns a pointer equal to buf+1 and outlen=10 without verifying that the claimed value length fits within the remaining buffer. In cases where the sccompacttlvfind_tag is provided untrusted data (such as being read from cards/files), attackers may be able to influence it to return out-of-bounds pointers leading to downstream memory corruption when subsequent code tries to dereference the pointer. This issue has been patched in version 0.27.0.

Database specific 
{
    "cwe_ids": [
        "CWE-126"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66038.json",
    "cna_assigner": "GitHub_M"
}
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
6db171bcb6fd7cb3b51098fefbb3b28e44f0a79c
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.27.0"
        }
    ],
    "cpe": "cpe:2.3:a:opensc_project:opensc:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

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

vanir_signatures 
[
    {
        "target": {
            "file": "src/libopensc/card-idprime.c"
        },
        "digest": {
            "line_hashes": [
                "197077062409851014049150881454686052651",
                "116874431869949048830812280705968601837",
                "178347451590943443467517413724441716670",
                "64384897257287561373260242149812150104",
                "128939127976228477246498514475977417660",
                "328551807216414904676468422493279414826",
                "275193146505267519530501610440190952955",
                "125295909231836846075869067429066912866",
                "92530406835395599398656616018502244074"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2025-66038-7af18f0d",
        "signature_type": "Line",
        "signature_version": "v1",
        "deprecated": false,
        "source": "https://github.com/opensc/opensc/commit/6db171bcb6fd7cb3b51098fefbb3b28e44f0a79c"
    }
]
vanir_signatures_modified 
"2026-06-18T13:17:17Z"
source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-66038.json"