{
  "cveId": "CVE-2026-90291",
  "url": "https://patchblox.com/security/cve/CVE-2026-90291",
  "summary": "CVE-2026-90291 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-90291, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "module/dups: Fix use-after-free in kmod_dup_req lifetime handling",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  module/dups: Fix use-after-free in kmod_dup_req lifetime handling  The kmod dups code uses RCU to ensure that a kmod_dup_req instance is freed only after it is no longer referenced. When releasing an instance, the kmod_dup_request_delete() function removes the kmod_dup_req from the dup_kmod_reqs list, waits via synchronize_rcu() and finally frees it. However, this doesn\u0027t work correctly because parallel users referencing the instance in kmod_dup_request_exists_wait() don\u0027t enter an RCU read-side critical section. This can result in a use-after-free.  The kmod_dup_request_exists_wait() function may need to hold a valid reference to a kmod_dup_req instance across a blocking wait until the corresponding modprobe command completes. This makes it unsuitable for RCU.  Fix the issue by changing the lifecycle management of kmod_dup_req to use reference counting.",
  "published": "2026-09-17T17:17:26Z",
  "severity": "Important",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.0017,
  "epssPercentile": 0.06431,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90291",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.111-1",
      "fix": "DEBIAN-CVE-2026-90291",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90291",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-90291",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90291",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.111-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-90291",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90291",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "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"
  }
}