{
  "cveId": "CVE-2026-98788",
  "url": "https://patchblox.com/security/cve/CVE-2026-98788",
  "summary": "CVE-2026-98788 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2026-98788, released October 19, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "futex: Fix private hash use-after-free on resize",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  futex: Fix private hash use-after-free on resize  poll_state_synchronize_rcu(mm-\u003Efutex.phash.batches) is used by futex_ref_drop() to check that a grace period has passed since the current hash was published. This relies on batches referencing a grace period which started after the hash pointer was assigned.  __futex_pivot_hash() sets mmph-\u003Ebatches before it replaces mmph-\u003Ehash:      scoped_guard(rcu) {             mmph-\u003Ebatches = get_state_synchronize_rcu();             rcu_assign_pointer(mmph-\u003Ehash, new);     }  The scoped_guard(rcu) doesn\u0027t stop new grace periods from starting, and if one starts between those two assignments, futex_ref_drop() can move forward while a reader still holds a pointer to the old hash.  Fix things by setting mmph-\u003Ebatches after assigning mmph-\u003Ehash.  The scoped_guard(rcu) isn\u0027t needed, so let\u0027s drop that as well.",
  "published": "2026-10-18T16:17:32Z",
  "severity": "important",
  "epss": 0.00155,
  "epssPercentile": 0.04756,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98788",
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.56-126.188",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.10-1",
      "fix": "DEBIAN-CVE-2026-98788",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98788",
      "released": "2026-10-19T16:27:52Z"
    },
    {
      "platform": "linux",
      "product": "microvm-kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
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      "product": "perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.56-126.188.amzn2023",
      "fix": "ALAS2023-2026-3390",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3390",
      "released": "2026-11-10T03:56:13Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-11T13:47:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}