{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-66038",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2025-11-21T01:08:02.615Z",
        "datePublished": "2026-03-30T17:03:55.914Z",
        "dateUpdated": "2026-04-01T18:15:33.347Z"
    },
    "containers": {
        "cna": {
            "title": "OpenSC: `sc_compacttlv_find_tag` can return out-of-bounds pointers",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-126",
                            "lang": "en",
                            "description": "CWE-126: Buffer Over-read",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "PHYSICAL",
                        "availabilityImpact": "LOW",
                        "baseScore": 3.9,
                        "baseSeverity": "LOW",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/OpenSC/OpenSC/security/advisories/GHSA-72x5-fwjx-2459",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/OpenSC/OpenSC/security/advisories/GHSA-72x5-fwjx-2459"
                },
                {
                    "name": "https://github.com/OpenSC/OpenSC/commit/6db171bcb6fd7cb3b51098fefbb3b28e44f0a79c",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/OpenSC/OpenSC/commit/6db171bcb6fd7cb3b51098fefbb3b28e44f0a79c"
                },
                {
                    "name": "https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66038",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66038"
                }
            ],
            "affected": [
                {
                    "vendor": "OpenSC",
                    "product": "OpenSC",
                    "versions": [
                        {
                            "version": "< 0.27.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-03-30T17:03:55.914Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, sc_compacttlv_find_tag 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 sc_compacttlv_find_tag 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 sc_compacttlv_find_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."
                }
            ],
            "source": {
                "advisory": "GHSA-72x5-fwjx-2459",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-04-01T18:15:18.318069Z",
                                "id": "CVE-2025-66038",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-04-01T18:15:33.347Z"
                }
            }
        ]
    }
}