{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-44983", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-08T16:23:33.264Z", "datePublished": "2026-05-26T21:38:13.753Z", "dateUpdated": "2026-05-27T12:45:15.497Z"}, "containers": {"cna": {"title": "smallbitvec: Safe API Triggered Heap Buffer Overflow via Integer Overflow", "problemTypes": [{"descriptions": [{"cweId": "CWE-122", "lang": "en", "description": "CWE-122: Heap-based Buffer Overflow", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-190", "lang": "en", "description": "CWE-190: Integer Overflow or Wraparound", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr"}], "affected": [{"vendor": "servo", "product": "smallbitvec", "versions": [{"version": ">= 1.0.1, < 2.6.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-26T21:38:13.753Z"}, "descriptions": [{"lang": "en", "value": "smallbitvec is a growable bit-vector for Rust, optimized for size. From 1.0.1 to 2.6.0, an integer overflow in the internal capacity calculation of smallbitvec can lead to an undersized heap allocation, resulting in a heap buffer overflow through safe APIs only. This allows memory corruption without requiring unsafe code from the caller. This vulnerability is fixed in 2.6.1."}], "source": {"advisory": "GHSA-97wc-2hqc-cjgr", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-27T12:45:06.921929Z", "id": "CVE-2026-44983", "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": "2026-05-27T12:45:15.497Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"cna": {"title": "smallbitvec: Safe API Triggered Heap Buffer Overflow via Integer Overflow", "source": {"advisory": "GHSA-97wc-2hqc-cjgr", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.3, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}], "affected": [{"vendor": "servo", "product": "smallbitvec", "versions": [{"status": "affected", "version": ">= 1.0.1, < 2.6.1"}]}], "references": [{"url": "https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr", "name": "https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr", "tags": ["x_refsource_CONFIRM"]}], "descriptions": [{"lang": "en", "value": "smallbitvec is a growable bit-vector for Rust, optimized for size. From 1.0.1 to 2.6.0, an integer overflow in the internal capacity calculation of smallbitvec can lead to an undersized heap allocation, resulting in a heap buffer overflow through safe APIs only. This allows memory corruption without requiring unsafe code from the caller. This vulnerability is fixed in 2.6.1."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-122", "description": "CWE-122: Heap-based Buffer Overflow"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-190", "description": "CWE-190: Integer Overflow or Wraparound"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-26T21:38:13.753Z"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-44983", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-27T12:45:06.921929Z"}}}], "references": [{"url": "https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr", "tags": ["exploit"]}], "providerMetadata": {"shortName": "CISA-ADP", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "dateUpdated": "2026-05-27T12:44:58.323Z"}}]}, "cveMetadata": {"cveId": "CVE-2026-44983", "state": "PUBLISHED", "dateUpdated": "2026-05-26T21:38:13.753Z", "dateReserved": "2026-05-08T16:23:33.264Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-05-26T21:38:13.753Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "smallbitvec is a growable bit-vector for Rust, optimized for size. From 1.0.1 to 2.6.0, an integer overflow in the internal capacity calculation of smallbitvec can lead to an undersized heap allocation, resulting in a heap buffer overflow through safe APIs only. This allows memory corruption without requiring unsafe code from the caller. This vulnerability is fixed in 2.6.1."}], "id": "CVE-2026-44983", "lastModified": "2026-05-27T14:16:56.337", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 4.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-26T22:16:43.440", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}, {"lang": "en", "value": "CWE-190"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.0.1,2.6.1)"}}], "enrichment": {"confidence": 90.0, "confidence_source": "matching", "scores": [{"score": 90.0, "source": "matching"}]}, "original": {"product": "smallbitvec", "source": "cna", "vendor": "servo"}, "product": "smallvec", "vendor": "servo"}], "created": "2026-05-26T23:00:17.010812+00:00", "updated": "2026-05-27T09:15:29.779411+00:00", "vendors": ["servo", "servo$PRODUCT$smallvec"]}