{
  "cveId": "CVE-2026-102821",
  "url": "https://patchblox.com/security/cve/CVE-2026-102821",
  "summary": "CVE-2026-102821 is fixed in rust-russh on 1 platform by DEBIAN-CVE-2026-102821 (version 0.64.1-1), released October 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "rust-russh: Russh is a Rust SSH client and server library",
  "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.",
  "published": "2026-09-29T19:17:23Z",
  "severity": "medium",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00358,
  "epssPercentile": 0.29806,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "rust-russh",
      "release": "Debian 14",
      "fixedVersion": "0.64.1-1",
      "fix": "DEBIAN-CVE-2026-102821",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-102821",
      "released": "2026-10-16T15:52:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T07:50:38Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}