{"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": "2026-03-30T17:03:55.914Z"}, "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2025-66038", "lastModified": "2026-03-30T18:16:18.177", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 0.5, "impactScore": 3.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-30T18:16:18.177", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/OpenSC/OpenSC/commit/6db171bcb6fd7cb3b51098fefbb3b28e44f0a79c"}, {"source": "security-advisories@github.com", "url": "https://github.com/OpenSC/OpenSC/security/advisories/GHSA-72x5-fwjx-2459"}, {"source": "security-advisories@github.com", "url": "https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66038"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-126"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}