{"id":"CVE-2026-102821","revision":"33c404f2d9744a1b98653e3a57dd13b0","records":[{"revision":"33c404f2d9744a1b98653e3a57dd13b0","observedAt":"2026-10-25T04:17:26.915+00:00","statement":{"source":"nvd","id":"CVE-2026-102821","aliases":[],"title":"Russh is a Rust SSH client and server library. Prior to 0.63.2, an authenticated remote peer can send SSH_MSG_KEXINIT without the required SSH_MSG_KEX_ECDH_INIT and then flood SSH_MSG_CHANNEL_OPEN messages while SessionKexState::InProgress …","description":"Russh is a Rust SSH client and server library. Prior to 0.63.2, an authenticated remote peer can send SSH_MSG_KEXINIT without the required SSH_MSG_KEX_ECDH_INIT and then flood SSH_MSG_CHANNEL_OPEN messages while SessionKexState::InProgress prevents priority_receiver in russh/src/server/session.rs from being drained. The server continues processing network input and enqueues a ChannelOpenReply for each request on an unbounded channel, allowing one connection to grow memory until the process is terminated. This issue is fixed in version 0.63.2.","state":0,"publishedAt":"2026-09-29T19:17:23.993+00:00","modifiedAt":"2026-09-30T20:17:23.793+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/Eugeny/russh/commit/a282af361ac99bc76b80876d1aae128e89dbf66b","https://github.com/Eugeny/russh/releases/tag/v0.63.2","https://github.com/Eugeny/russh/security/advisories/GHSA-35g8-35p8-c8fw"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102821","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-400","CWE-770"],"productCriteria":[],"sourceDates":{"published":"2026-09-29T19:17:23.993","lastModified":"2026-09-30T20:17:23.793"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-102821","identifiers":["CVE-2026-102821"]},"retained":false,"historicalAffected":[]}],"coverage":[]}