{"id":"GHSA-9q54-f358-3fqf","revision":"34e7b9b444e542a9aae5c7ea6d69e394","records":[{"revision":"34e7b9b444e542a9aae5c7ea6d69e394","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"GHSA-9q54-f358-3fqf","aliases":["CVE-2026-10740"],"title":"s2n-quic has excessive memory allocation","description":"s2n-quic is a Rust implementation of the QUIC protocol. An unauthenticated user can attempt to exhaust server memory on an s2n-quic endpoint by sending crafted CRYPTO frames with high offsets. The buffer used for processing CRYPTO frames does not enforce a maximum size. In the worst case, a single 1200-byte packet can cause approximately 9.4 MB of allocation. By repeatedly sending such packets, the resulting memory pressure could cause denial of service. 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). Please do not create a public GitHub issue.","state":0,"publishedAt":"2026-08-14T21:44:19+00:00","modifiedAt":"2026-08-14T22:00:07.6744028+00:00","affected":[{"ecosystem":"crates.io","name":"s2n-quic","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.82.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":null,"severity":null},{"system":"CVSS_V4","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":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/aws/s2n-quic/security/advisories/GHSA-9q54-f358-3fqf","https://nvd.nist.gov/vuln/detail/CVE-2026-10740","https://aws.amazon.com/security/security-bulletins/2026-042-aws","https://github.com/aws/s2n-quic","https://github.com/aws/s2n-quic/releases/tag/v1.82.0"],"sourceUrl":"https://github.com/advisories/GHSA-9q54-f358-3fqf","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-9q54-f358-3fqf","identifiers":["GHSA-9q54-f358-3fqf","CVE-2026-10740"]},"retained":false,"historicalAffected":[]}],"coverage":[]}