{
  "cveId": "CVE-2026-43376",
  "url": "https://patchblox.com/security/cve/CVE-2026-43376",
  "summary": "CVE-2026-43376 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-43376, released May 15, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ksmbd: fix use-after-free by using call_rcu() fo...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ksmbd: fix use-after-free by using call_rcu() for oplock_info  ksmbd currently frees oplock_info immediately using kfree(), even though it is accessed under RCU read-side critical sections in places like opinfo_get() and proc_show_files().  Since there is no RCU grace period delay between nullifying the pointer and freeing the memory, a reader can still access oplock_info structure after it has been freed. This can leads to a use-after-free especially in opinfo_get() where atomic_inc_not_zero() is called on already freed memory.  Fix this by switching to deferred freeing using call_rcu().",
  "published": "2026-05-08T15:16:48Z",
  "severity": "critical",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00444,
  "epssPercentile": 0.38869,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.85-1",
      "fix": "DEBIAN-CVE-2026-43376",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43376",
      "released": "2026-05-15T16:01:09Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.19.10-1",
      "fix": "DEBIAN-CVE-2026-43376",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43376",
      "released": "2026-05-15T16:01:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}