{
  "cveId": "CVE-2026-99270",
  "url": "https://patchblox.com/security/cve/CVE-2026-99270",
  "summary": "CVE-2026-99270 is fixed in linux on 1 platform by DEBIAN-CVE-2026-99270 (version 7.1.3-1), released November 4, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "tcp: Fix potential UAF in reqsk_timer_handler().",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  tcp: Fix potential UAF in reqsk_timer_handler().  When TCP socket migration fails at inet_ehash_insert() in reqsk_timer_handler(), we jump to the no_ownership: label and free the new reqsk immediately with __reqsk_free().  Thus, we must stop the new reqsk\u0027s timer before jumping to the label, but the timer might be missed since the cited commit, resulting in UAF.  As we are in the original reqsk\u0027s timer context, we can safely call timer_delete_sync() for the new reqsk.  Let\u0027s pass false to __inet_csk_reqsk_queue_drop() to stop the new reqsk\u0027s timer.",
  "published": "2026-11-03T13:17:24Z",
  "severity": "Important",
  "cvss": 8.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00335,
  "epssPercentile": 0.27077,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-99270",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.3-1",
      "fix": "DEBIAN-CVE-2026-99270",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99270",
      "released": "2026-11-04T19:14:43Z"
    }
  ],
  "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"
  }
}