{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-44905", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-07T21:50:33.547Z", "datePublished": "2026-05-26T21:18:33.445Z", "dateUpdated": "2026-05-26T21:18:33.445Z"}, "containers": {"cna": {"title": "Vanetza: Remote Denial of Service via Uncaught OER Encoding Exception in Cryptographic Verification", "problemTypes": [{"descriptions": [{"cweId": "CWE-248", "lang": "en", "description": "CWE-248: Uncaught Exception", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"name": "https://github.com/riebl/vanetza/security/advisories/GHSA-q9fq-3rx9-7xcv", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/riebl/vanetza/security/advisories/GHSA-q9fq-3rx9-7xcv"}, {"name": "https://github.com/riebl/vanetza/commit/e1a2e2709210d309458c3d77f98d50dec26c0df0", "tags": ["x_refsource_MISC"], "url": "https://github.com/riebl/vanetza/commit/e1a2e2709210d309458c3d77f98d50dec26c0df0"}], "affected": [{"vendor": "riebl", "product": "vanetza", "versions": [{"version": "< e1a2e2709210d309458c3d77f98d50dec26c0df0", "status": "affected"}, {"version": "<= 26.02", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-26T21:18:33.445Z"}, "descriptions": [{"lang": "en", "value": "Vanetza is an open-source implementation of the ETSI C-ITS protocol suite. In 26.02 and earlier, a denial-of-service vulnerability was identified in the cryptographic verification pipeline of Vanetza. When processing incoming V2X messages, the ASN.1 decoder accepts the structure as syntactically valid. However, this reveals a logic-based protocol failure where semantic constraints on specific fields are only strictly enforced during OER re-encoding. Specifically, if a crafted packet contains a certificate where the Psid (Provider Service Identifier) sub-type violates subtype constraints (e.g., out-of-range or invalid CHOICE variant), it is accepted during initial parsing, where subtype constraints are not enforced. Later, when StraightVerifyService attempts to calculate a message hash for cryptographic verification, it must re-encode the signing certificate. The underlying ASN.1 wrapper (asn1c_wrapper.cpp) detects the semantic violation during encoding and raises a std::runtime_error. This exception is not caught within the encoding path and propagates to std::terminate, resulting in immediate process termination. This vulnerability is fixed with commit e1a2e2709210d309458c3d77f98d50dec26c0df0."}], "source": {"advisory": "GHSA-q9fq-3rx9-7xcv", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Vanetza is an open-source implementation of the ETSI C-ITS protocol suite. In 26.02 and earlier, a denial-of-service vulnerability was identified in the cryptographic verification pipeline of Vanetza. When processing incoming V2X messages, the ASN.1 decoder accepts the structure as syntactically valid. However, this reveals a logic-based protocol failure where semantic constraints on specific fields are only strictly enforced during OER re-encoding. Specifically, if a crafted packet contains a certificate where the Psid (Provider Service Identifier) sub-type violates subtype constraints (e.g., out-of-range or invalid CHOICE variant), it is accepted during initial parsing, where subtype constraints are not enforced. Later, when StraightVerifyService attempts to calculate a message hash for cryptographic verification, it must re-encode the signing certificate. The underlying ASN.1 wrapper (asn1c_wrapper.cpp) detects the semantic violation during encoding and raises a std::runtime_error. This exception is not caught within the encoding path and propagates to std::terminate, resulting in immediate process termination. This vulnerability is fixed with commit e1a2e2709210d309458c3d77f98d50dec26c0df0."}], "id": "CVE-2026-44905", "lastModified": "2026-05-26T22:16:43.150", "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": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-26T22:16:43.150", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/riebl/vanetza/commit/e1a2e2709210d309458c3d77f98d50dec26c0df0"}, {"source": "security-advisories@github.com", "url": "https://github.com/riebl/vanetza/security/advisories/GHSA-q9fq-3rx9-7xcv"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-248"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "< e1a2e2709210d309458c3d77f98d50dec26c0df0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "<= 26.02"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "vanetza", "source": "cna", "vendor": "riebl"}, "product": "vanetza", "vendor": "riebl"}], "created": "2026-05-26T22:30:17.920681+00:00", "updated": "2026-05-26T22:30:18.408851+00:00", "vendors": ["riebl", "riebl$PRODUCT$vanetza"]}