{
  "cveId": "CVE-2026-34956",
  "url": "https://patchblox.com/security/cve/CVE-2026-34956",
  "summary": "CVE-2026-34956 is fixed in openvswitch on 1 platform, first by SUSE-SU-2026:1439-1, released April 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Openvswitch: open vswitch: denial of service via malformed ftp epasv command",
  "description": "A flaw was found in Open vSwitch. When Open vSwitch is configured with a conntrack flow using FTP helpers over the userspace datapath, a remote attacker can send a specially crafted FTP stream with an EPASV command exceeding 255 characters. This heap access error can lead to a crash, resulting in a Denial of Service (DoS) for the affected system.",
  "published": "2026-04-17T13:43:31Z",
  "severity": "Moderate",
  "cvss": 5.9,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
  "epss": 0.00405,
  "epssPercentile": 0.35035,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34956",
  "fixes": [
    {
      "platform": "linux",
      "product": "openvswitch",
      "release": "Debian 14",
      "fixedVersion": "3.7.1-1",
      "fix": "DEBIAN-CVE-2026-34956",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-34956",
      "released": "2026-05-15T16:01:09Z"
    },
    {
      "platform": "linux",
      "product": "openvswitch",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.5.4-160000.4.1",
      "fix": "OPENSUSE-SU-2026:20972-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20972-1",
      "released": "2026-06-17T08:37:36Z"
    },
    {
      "platform": "linux",
      "product": "openvswitch",
      "release": "sles 15.7",
      "fixedVersion": "3.5.4-150700.41.15.1",
      "fix": "SUSE-SU-2026:1439-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1439-1",
      "released": "2026-04-17T13:43:31Z"
    },
    {
      "platform": "linux",
      "product": "openvswitch",
      "release": "sles 16.0",
      "fixedVersion": "3.5.4-160000.4.1",
      "fix": "SUSE-SU-2026:22152-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22152-1",
      "released": "2026-06-17T08:36:56Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}