FKIE_CVE-2026-64373

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-07-25 10:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: cpufreq: Fix hotplug-suspend race during reboot During system reboot, cpufreq_suspend() is called via the kernel_restart() -> device_shutdown() path. Unlike the normal system suspend path, the reboot path does not call freeze_processes(), so userspace processes and kernel threads remain active. This allows CPU hotplug operations to run concurrently with cpufreq_suspend(). The original code has no synchronization with CPU hotplug, leading to a race condition where governor_data can be freed by the hotplug path while cpufreq_suspend() is still accessing it, resulting in a null pointer dereference: Unable to handle kernel NULL pointer dereference Call Trace: do_kernel_fault+0x28/0x3c cpufreq_suspend+0xdc/0x160 device_shutdown+0x18/0x200 kernel_restart+0x40/0x80 arm64_sys_reboot+0x1b0/0x200 Fix this by adding cpus_read_lock()/cpus_read_unlock() to cpufreq_suspend() to block CPU hotplug operations while suspend is in progress. [ rjw: Changelog edits ]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6d5dd354c37abaf4d60400c55c71f23ba2b33639
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6e175c00c62dca3d91b987015808b5d52e8db2b4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/73255d702c7560185fd5951aadcf7eb057c2f453
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9103078c7b3091a2fbb52af176f95982ee7dd7f8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a0106b41f9a724868d390b8b3b4ea5ca0e04ea53
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a0ef2fc89d28ca62923376c4b8ffaa57136a36be
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a9029dd55696c651ee46912afa2a166fa456bb3e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cd4524ff6567fa4458a5bec4b017105e671d393e
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/cpufreq/cpufreq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6d5dd354c37abaf4d60400c55c71f23ba2b33639",
              "status": "affected",
              "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
              "versionType": "git"
            },
            {
              "lessThan": "9103078c7b3091a2fbb52af176f95982ee7dd7f8",
              "status": "affected",
              "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
              "versionType": "git"
            },
            {
              "lessThan": "cd4524ff6567fa4458a5bec4b017105e671d393e",
              "status": "affected",
              "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
              "versionType": "git"
            },
            {
              "lessThan": "73255d702c7560185fd5951aadcf7eb057c2f453",
              "status": "affected",
              "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
              "versionType": "git"
            },
            {
              "lessThan": "a0ef2fc89d28ca62923376c4b8ffaa57136a36be",
              "status": "affected",
              "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
              "versionType": "git"
            },
            {
              "lessThan": "6e175c00c62dca3d91b987015808b5d52e8db2b4",
              "status": "affected",
              "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
              "versionType": "git"
            },
            {
              "lessThan": "a0106b41f9a724868d390b8b3b4ea5ca0e04ea53",
              "status": "affected",
              "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
              "versionType": "git"
            },
            {
              "lessThan": "a9029dd55696c651ee46912afa2a166fa456bb3e",
              "status": "affected",
              "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8bfa06ea6e81bf08d2132d7e70c2b5313b34caf8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7ccf3b8b7a12dc9da158c2e699c36d04b2496944",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5f466713989250938624afa79dc33bae20920700",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "89ab39da1452d272007acc5912d4008047b86706",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cb4b4601f910c78d2b49f637a12ef98b41cb76a9",
              "versionType": "git"
            },
            {
              "lessThan": "4.5",
              "status": "affected",
              "version": "4.4.198",
              "versionType": "semver"
            },
            {
              "lessThan": "4.10",
              "status": "affected",
              "version": "4.9.198",
              "versionType": "semver"
            },
            {
              "lessThan": "4.15",
              "status": "affected",
              "version": "4.14.151",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.81",
              "versionType": "semver"
            },
            {
              "lessThan": "5.4",
              "status": "affected",
              "version": "5.3.8",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/cpufreq/cpufreq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: Fix hotplug-suspend race during reboot\n\nDuring system reboot, cpufreq_suspend() is called via the\nkernel_restart() -\u003e device_shutdown() path. Unlike the normal system\nsuspend path, the reboot path does not call freeze_processes(), so\nuserspace processes and kernel threads remain active.\n\nThis allows CPU hotplug operations to run concurrently with\ncpufreq_suspend(). The original code has no synchronization with CPU\nhotplug, leading to a race condition where governor_data can be freed\nby the hotplug path while cpufreq_suspend() is still accessing it,\nresulting in a null pointer dereference:\n\n  Unable to handle kernel NULL pointer dereference\n  Call Trace:\n   do_kernel_fault+0x28/0x3c\n   cpufreq_suspend+0xdc/0x160\n   device_shutdown+0x18/0x200\n   kernel_restart+0x40/0x80\n   arm64_sys_reboot+0x1b0/0x200\n\nFix this by adding cpus_read_lock()/cpus_read_unlock() to\ncpufreq_suspend() to block CPU hotplug operations while suspend is in\nprogress.\n\n[ rjw: Changelog edits ]"
    }
  ],
  "id": "CVE-2026-64373",
  "lastModified": "2026-07-25T10:17:20.283",
  "metrics": {},
  "published": "2026-07-25T10:17:20.283",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6d5dd354c37abaf4d60400c55c71f23ba2b33639"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6e175c00c62dca3d91b987015808b5d52e8db2b4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/73255d702c7560185fd5951aadcf7eb057c2f453"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9103078c7b3091a2fbb52af176f95982ee7dd7f8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a0106b41f9a724868d390b8b3b4ea5ca0e04ea53"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a0ef2fc89d28ca62923376c4b8ffaa57136a36be"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a9029dd55696c651ee46912afa2a166fa456bb3e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cd4524ff6567fa4458a5bec4b017105e671d393e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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