{
  "cveId": "CVE-2026-31609",
  "url": "https://patchblox.com/security/cve/CVE-2026-31609",
  "summary": "CVE-2026-31609 is fixed in 19 products on 1 platform, first by DEBIAN-CVE-2026-31609, released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()  smbd_send_batch_flush() already calls smbd_free_send_io(), so we should not call it again after smbd_post_send() moved it to the batch list.",
  "published": "2026-04-24T15:16:40Z",
  "severity": "Important",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00457,
  "epssPercentile": 0.39902,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31609",
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.25-52.107",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.19.14-1",
      "fix": "DEBIAN-CVE-2026-31609",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-31609",
      "released": "2026-05-15T16:01:09Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.25-52.107.amzn2023",
      "fix": "ALAS2023-2026-1746",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1746",
      "released": "2026-05-25T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}