{
  "cveId": "CVE-2021-28041",
  "url": "https://patchblox.com/security/cve/CVE-2021-28041",
  "summary": "CVE-2021-28041 is fixed in 6 products on 1 platform, first by openssh-client 1:8.2p1-4ubuntu0.2, released March 5, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "openssh-sftp-server: ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as uncons...",
  "description": "ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as unconstrained agent-socket access on a legacy operating system, or the forwarding of an agent to an attacker-controlled host.",
  "published": "2021-03-05T13:15:00Z",
  "severity": "Medium",
  "epss": 0.03513,
  "epssPercentile": 0.89281,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "openssh-client",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:8.2p1-4ubuntu0.2",
      "fix": "openssh-client 1:8.2p1-4ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-openssh-client-1-8.2p1-4ubuntu0.2",
      "released": "2021-03-05T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "openssh-server",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:8.2p1-4ubuntu0.2",
      "fix": "openssh-server 1:8.2p1-4ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-openssh-server-1-8.2p1-4ubuntu0.2",
      "released": "2021-03-05T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "openssh-sftp-server",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:8.2p1-4ubuntu0.2",
      "fix": "openssh-sftp-server 1:8.2p1-4ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-openssh-sftp-server-1-8.2p1-4ubuntu0.2",
      "released": "2021-03-05T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "openssh-tests",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:8.2p1-4ubuntu0.2",
      "fix": "openssh-tests 1:8.2p1-4ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-openssh-tests-1-8.2p1-4ubuntu0.2",
      "released": "2021-03-05T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "ssh",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:8.2p1-4ubuntu0.2",
      "fix": "ssh 1:8.2p1-4ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-ssh-1-8.2p1-4ubuntu0.2",
      "released": "2021-03-05T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "ssh-askpass-gnome",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:8.2p1-4ubuntu0.2",
      "fix": "ssh-askpass-gnome 1:8.2p1-4ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-ssh-askpass-gnome-1-8.2p1-4ubuntu0.2",
      "released": "2021-03-05T13:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}