{"id":"EUVD-2026-36103","revision":null,"records":[{"revision":"da79091a189842bdbf7ec386d67f8994","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-10740","aliases":[],"title":"Excessive memory allocation in s2n-quic","description":"Unbounded memory allocation in the CRYPTO frame reassembler in s2n-quic before 1.8.2 may allow an unauthenticated remote actor to cause a denial of service (degraded availability) by sending crafted QUIC Initial packets.\n\n\n\nTo remediate this issue, users should upgrade to v1.8.2.","state":0,"publishedAt":"2026-06-10T18:09:36.07+00:00","modifiedAt":"2026-06-10T19:14:59.133+00:00","affected":[{"ecosystem":"Vendor product","name":"s2n-quic","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"AWS\",\n                    \"product\": \"s2n-quic\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"1.8.1\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":6.9,"severity":"MEDIUM"}],"references":["https://github.com/aws/s2n-quic/releases/tag/v1.82.0","https://aws.amazon.com/security/security-bulletins/2026-042-aws/","https://github.com/aws/s2n-quic/security/advisories/GHSA-9q54-f358-3fqf"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-10740","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-10740","identifiers":["CVE-2026-10740"]},"retained":false,"historicalAffected":[]},{"revision":"5b712726c8cb4675b05f3b9d1dd4a85a","observedAt":"2026-11-07T04:31:27.75+00:00","statement":{"source":"euvd","id":"EUVD-2026-36103","aliases":["CVE-2026-10740","GHSA-9q54-f358-3fqf"],"title":"Unbounded memory allocation in the CRYPTO frame reassembler in s2n-quic before 1.8.2 may allow an unauthenticated remote actor to cause a denial of service (degraded availability) by sending crafted QUIC Initial packets.","description":"Unbounded memory allocation in the CRYPTO frame reassembler in s2n-quic before 1.8.2 may allow an unauthenticated remote actor to cause a denial of service (degraded availability) by sending crafted QUIC Initial packets.\n\n\n\nTo remediate this issue, users should upgrade to v1.8.2.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":6.9,"severity":null}],"references":["https://github.com/aws/s2n-quic/releases/tag/v1.82.0","https://aws.amazon.com/security/security-bulletins/2026-042-aws/","https://github.com/aws/s2n-quic/security/advisories/GHSA-9q54-f358-3fqf"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-36103","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 10, 2026, 6:09:36 PM","dateUpdated":"Jun 10, 2026, 7:14:59 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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No valid handshake is required.\n\nImpacted versions: <= v1.81.0\n\n### Patches\nThis issue has been addressed in s2n-quic version v1.82.0. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.\u00A0\n\n### Workarounds\nThere is no workaround that fully mitigates this issue. Upgrading to the patched version is the recommended remediation.\n\n### References\nIf there are any questions or comments about this advisory, contact AWS Security via the [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). 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