{
  "cveId": "CVE-2026-64075",
  "url": "https://patchblox.com/security/cve/CVE-2026-64075",
  "summary": "CVE-2026-64075 is fixed in 20 products on 1 platform, first by ALAS2023-2026-1881, released June 22, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  fprobe: Fix unregister_fprobe() to wait for RCU...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fprobe: Fix unregister_fprobe() to wait for RCU grace period  Commit 4346ba1604093 (\u0022fprobe: Rewrite fprobe on function-graph tracer\u0022) changed fprobe to register struct fprobe to an rcu-hlist, but it forgot to wait for RCU GP. Thus there can be use-after-free if the fprobe is released right after unregistering. This can be happened on fprobe event and sample module code.  To fix this issue, add synchronize_rcu() in unregister_fprobe().  Note that BPF is OK because fprobe is used as a part of bpf_kprobe_multi_link. This unregisters its fprobe in bpf_kprobe_multi_link_release() and it is deallocated via bpf_kprobe_multi_link_dealloc(), which is invoked from bpf_link_defer_dealloc_rcu_gp() RCU callback.  For BPF, this also introduced unregister_fprobe_async() which does NOT wait for RCU grace priod.",
  "published": "2026-06-22T09:00:00Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00168,
  "epssPercentile": 0.06213,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.35-68.127",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.12-1",
      "fix": "DEBIAN-CVE-2026-64075",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-64075",
      "released": "2026-07-20T12:58:36Z"
    },
    {
      "platform": "linux",
      "product": "microvm-kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.35-68.127.amzn2023",
      "fix": "ALAS2023-2026-1881",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1881",
      "released": "2026-06-22T09:00:00Z"
    }
  ],
  "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"
  }
}