{
  "cveId": "CVE-2026-102820",
  "url": "https://patchblox.com/security/cve/CVE-2026-102820",
  "summary": "CVE-2026-102820 is fixed in rust-russh on 1 platform by DEBIAN-CVE-2026-102820 (version 0.64.1-1), released October 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "rust-russh: pageant provides a [PageantStream] type that implements [AsyncRead] and [AsyncWrite] traits and can be used to talk t...",
  "description": "pageant provides a [PageantStream] type that implements [AsyncRead] and [AsyncWrite] traits and can be used to talk to a running Pageant instance. Prior to pageant 0.2.3, the Windows pageant crate\u0027s pageant/src/wmmessage.rs MemoryMap::read function trusts a peer-controlled u32 response length supplied through the 8192-byte Pageant shared-memory mapping reached by AgentClient::connect_pageant. A local process that impersonates the Pageant window can make query_pageant_direct allocate up to approximately 4 GiB and copy beyond the mapped view, reliably crashing a russh client and conditionally exposing adjacent committed memory. This issue is fixed in pageant 0.2.3.",
  "published": "2026-09-29T19:17:23Z",
  "severity": "medium",
  "cvss": 6.2,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00191,
  "epssPercentile": 0.08776,
  "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-2026-102820",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-102820",
      "released": "2026-10-16T15:52:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T01:44:33Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}