{
  "cveId": "CVE-2026-64259",
  "url": "https://patchblox.com/security/cve/CVE-2026-64259",
  "summary": "CVE-2026-64259 is fixed in 20 products on 1 platform, first by ALAS2023-2026-2045, released August 3, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  fuse-uring: make a fuse_req on SQE commit only f...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fuse-uring: make a fuse_req on SQE commit only findable after memcpy  Bad userspace might try to trick us and send commit SQEs request unique / commit-id of requests that are not even send to fuse-server (io_uring_cmd_done() not called) yet.  fuse_uring_commit_fetch() ends the fuse request when the ring entry has a wrong state, but that could have caused a use-after-free with the memcpy operations in fuse_uring_send_in_task(). In order to avoid such races the call of fuse_uring_add_to_pq() is moved after the copy operations and just before completing the io-uring request - malicious userspace cannot find the request anymore until all prepration work in fuse-client/kernel is completed.  This also moves fuse_uring_add_to_pq() a bit up in the code to avoid a forward declaration. Also not with a preparation commit, to make it easier to back port to older kernels.",
  "published": "2026-07-25T10:17:06Z",
  "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": 0.0621,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.39-79.141",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.4-1",
      "fix": "DEBIAN-CVE-2026-64259",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-64259",
      "released": "2026-08-07T15:22:10Z"
    },
    {
      "platform": "linux",
      "product": "microvm-kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.39-79.141.amzn2023",
      "fix": "ALAS2023-2026-2045",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2045",
      "released": "2026-08-03T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}