{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-41565", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-04-21T12:45:20.133Z", "datePublished": "2026-05-28T14:13:19.301Z", "dateUpdated": "2026-05-29T15:53:39.530Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "CryptX", "product": "CryptX", "programFiles": ["inc/CryptX_AuthEnc_GCM.xs.inc", "inc/CryptX_AuthEnc_CCM.xs.inc", "inc/CryptX_AuthEnc_ChaCha20Poly1305.xs.inc", "inc/CryptX_AuthEnc_EAX.xs.inc"], "programRoutines": [{"name": "gcm_decrypt_verify"}, {"name": "ccm_decrypt_verify"}, {"name": "chacha20poly1305_decrypt_verify"}, {"name": "eax_decrypt_verify"}], "repo": "https://github.com/DCIT/perl-CryptX", "vendor": "MIK", "versions": [{"lessThan": "0.088_001", "status": "affected", "version": "0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers.\n\nThe gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three.\n\nAny caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-121", "description": "CWE-121 Stack-based Buffer Overflow", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-05-28T14:13:19.301Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/DCIT/perl-CryptX/commit/57e69e541b0718ca8724c2f61514322a2d859bc1.patch"}, {"tags": ["patch"], "url": "https://github.com/DCIT/perl-CryptX/commit/7e56347d420aaf43b2ee1586f4a230492ccf1642.patch"}, {"tags": ["release-notes"], "url": "https://metacpan.org/release/MIK/CryptX-0.088_001"}], "solutions": [{"lang": "en", "value": "Upgrade to CryptX 0.088_001 or later."}], "source": {"discovery": "UNKNOWN"}, "timeline": [{"lang": "en", "time": "2026-04-21T00:00:00.000Z", "value": "Issue reported."}, {"lang": "en", "time": "2026-04-23T00:00:00.000Z", "value": "Version 0.088 released with fix for gcm_decrypt_verify."}, {"lang": "en", "time": "2026-04-28T00:00:00.000Z", "value": "Version 0.088_001 released with fixes for the remaining three helpers."}], "title": "CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers", "x_generator": {"engine": "cpansec-cna-tool 0.1"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/05/28/10"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-05-28T22:33:27.672Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-05-29T15:53:14.685373Z", "id": "CVE-2026-41565", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"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": "2026-05-29T15:53:39.530Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers.\n\nThe gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three.\n\nAny caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow."}], "id": "CVE-2026-41565", "lastModified": "2026-05-29T16:16:27.003", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-05-28T16:16:22.343", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://github.com/DCIT/perl-CryptX/commit/57e69e541b0718ca8724c2f61514322a2d859bc1.patch"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://github.com/DCIT/perl-CryptX/commit/7e56347d420aaf43b2ee1586f4a230492ccf1642.patch"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/MIK/CryptX-0.088_001"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/05/28/10"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{"bugzilla": {"description": "perl-CryptX: perl-CryptX: Stack buffer overflow allows arbitrary code execution via a crafted authentication tag.", "id": "2482740", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482740"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-120", "details": ["A flaw was found in perl-CryptX. A stack buffer overflow vulnerability exists in the AEAD (Authenticated Encryption with Associated Data) decrypt_verify helper routines. An attacker who can control the length of the authentication tag provided to these routines can cause a buffer overflow, potentially leading to arbitrary code execution or a denial of service."], "name": "CVE-2026-41565", "public_date": "2026-05-28T14:13:19Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-41565\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-41565\nhttps://github.com/DCIT/perl-CryptX/commit/57e69e541b0718ca8724c2f61514322a2d859bc1.patch\nhttps://github.com/DCIT/perl-CryptX/commit/7e56347d420aaf43b2ee1586f4a230492ccf1642.patch\nhttps://metacpan.org/release/MIK/CryptX-0.088_001"], "statement": "This IMPORTANT stack buffer overflow in perl-CryptX affects four AEAD decrypt_verify helpers. Exploitation requires no authentication and can be network-accessible if applications process untrusted cryptographic input. Impact is high to confidentiality, integrity, and availability through potential arbitrary code execution. Fixed in versions 0.088 (gcm) and 0.088_001 (ccm, chacha20poly1305, eax).", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,0.088_001)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "CryptX", "source": "cna", "vendor": "MIK"}, "product": "cryptx", "vendor": "mik"}], "created": "2026-05-28T16:30:15.372150+00:00", "updated": "2026-05-29T18:00:05.807700+00:00", "vendors": ["mik", "mik$PRODUCT$cryptx"]}