{"id":"UBUNTU-CVE-2026-102825","details":"Russh is a Rust SSH client and server library. Prior to 0.62.6, the USERAUTH_REQUEST path reached from server::run_stream in russh/src/server/encrypted.rs increments self.common.auth_attempts but never compares it with server::Config.max_auth_attempts. An unauthenticated remote client can continue submitting authentication requests on one connection beyond the configured cap, bypassing the deployment's attempt-limiting policy and increasing online guessing opportunity and backend authentication workload. This issue is fixed in version 0.62.6.","modified":"2026-10-17T12:57:57.783786549Z","published":"2026-09-29T19:17:00Z","upstream":["CVE-2026-102825"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-102825"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-102825"},{"type":"REPORT","url":"https://github.com/Eugeny/russh/security/advisories/GHSA-g6xm-f9xp-qq35"},{"type":"REPORT","url":"https://github.com/Eugeny/russh/commit/f8fd0b11a393364dc7f01a182482d86adafdd653"},{"type":"REPORT","url":"https://github.com/Eugeny/russh/releases/tag/v0.62.6"}],"affected":[{"package":{"name":"rust-russh","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/rust-russh?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.57.1-2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.57.1-2","binary_name":"librust-russh-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102825.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}