{
  "cveId": "CVE-2026-89709",
  "url": "https://patchblox.com/security/cve/CVE-2026-89709",
  "summary": "CVE-2026-89709 is fixed in 19 products on 1 platform, first by DEBIAN-CVE-2026-89709, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "lockd, nfsd: RCU-protect nlmsvc_ops dispatch",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  lockd, nfsd: RCU-protect nlmsvc_ops dispatch  nlmsvc_ops is published by nfsd_lockd_init() and cleared by nfsd_lockd_shutdown() with plain stores, while lockd dereferences it unguarded from dispatch sites in fs/lockd/svcsubs.c. The pointer targets nfsd\u0027s .rodata and the fopen/fclose callbacks live in nfsd\u0027s .text, so a stale load after rmmod nfsd results in either a NULL deref or a module-text use-after-free.  Declare nlmsvc_ops as __rcu, publish via rcu_assign_pointer(), clear via RCU_INIT_POINTER() \u002B synchronize_rcu(). Add a struct module *owner field to nlmsvc_binding and pin the module across indirect calls with try_module_get/module_put. When the binding is torn down, fall back to fput() to avoid leaking struct file references.",
  "published": "2026-09-11T20:19:58Z",
  "severity": "Moderate",
  "cvss": 8.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00532,
  "epssPercentile": 0.45278,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89709",
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.12",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.12-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.12.114-139.210",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-89709",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89709",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-89709",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89709",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "perf6.12",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
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      "product": "perf6.12-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
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      "product": "python3-perf6.12",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.12-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.114-139.210.amzn2023",
      "fix": "ALAS2023-2026-3402",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3402",
      "released": "2026-11-10T03:55:23Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-11T07:45:43Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}