{"api_version":"1","generated_at":"2026-08-01T21:37:50+00:00","cve":"CVE-2026-64373","urls":{"html":"https://cve.report/CVE-2026-64373","api":"https://cve.report/api/cve/CVE-2026-64373.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64373","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64373"},"summary":{"title":"cpufreq: Fix hotplug-suspend race during reboot","description":"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() -> 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 ]","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:20","updated_at":"2026-07-25 10:17:20"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9103078c7b3091a2fbb52af176f95982ee7dd7f8","name":"https://git.kernel.org/stable/c/9103078c7b3091a2fbb52af176f95982ee7dd7f8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6d5dd354c37abaf4d60400c55c71f23ba2b33639","name":"https://git.kernel.org/stable/c/6d5dd354c37abaf4d60400c55c71f23ba2b33639","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/73255d702c7560185fd5951aadcf7eb057c2f453","name":"https://git.kernel.org/stable/c/73255d702c7560185fd5951aadcf7eb057c2f453","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a9029dd55696c651ee46912afa2a166fa456bb3e","name":"https://git.kernel.org/stable/c/a9029dd55696c651ee46912afa2a166fa456bb3e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6e175c00c62dca3d91b987015808b5d52e8db2b4","name":"https://git.kernel.org/stable/c/6e175c00c62dca3d91b987015808b5d52e8db2b4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a0106b41f9a724868d390b8b3b4ea5ca0e04ea53","name":"https://git.kernel.org/stable/c/a0106b41f9a724868d390b8b3b4ea5ca0e04ea53","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a0ef2fc89d28ca62923376c4b8ffaa57136a36be","name":"https://git.kernel.org/stable/c/a0ef2fc89d28ca62923376c4b8ffaa57136a36be","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cd4524ff6567fa4458a5bec4b017105e671d393e","name":"https://git.kernel.org/stable/c/cd4524ff6567fa4458a5bec4b017105e671d393e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64373","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64373","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 6d5dd354c37abaf4d60400c55c71f23ba2b33639 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 9103078c7b3091a2fbb52af176f95982ee7dd7f8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 cd4524ff6567fa4458a5bec4b017105e671d393e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 73255d702c7560185fd5951aadcf7eb057c2f453 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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5.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.261 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.96 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64373","cve":"CVE-2026-64373","epss":"0.001770000","percentile":"0.075050000","score_date":"2026-07-28","updated_at":"2026-07-29 00:05:33"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"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"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.96","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4.198","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9.198","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.151","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*: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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() -> 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 ]"}],"providerMetadata":{"dateUpdated":"2026-07-25T08:50:25.427Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/6d5dd354c37abaf4d60400c55c71f23ba2b33639"},{"url":"https://git.kernel.org/stable/c/9103078c7b3091a2fbb52af176f95982ee7dd7f8"},{"url":"https://git.kernel.org/stable/c/cd4524ff6567fa4458a5bec4b017105e671d393e"},{"url":"https://git.kernel.org/stable/c/73255d702c7560185fd5951aadcf7eb057c2f453"},{"url":"https://git.kernel.org/stable/c/a0ef2fc89d28ca62923376c4b8ffaa57136a36be"},{"url":"https://git.kernel.org/stable/c/6e175c00c62dca3d91b987015808b5d52e8db2b4"},{"url":"https://git.kernel.org/stable/c/a0106b41f9a724868d390b8b3b4ea5ca0e04ea53"},{"url":"https://git.kernel.org/stable/c/a9029dd55696c651ee46912afa2a166fa456bb3e"}],"title":"cpufreq: Fix hotplug-suspend race during reboot","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64373","datePublished":"2026-07-25T08:50:25.427Z","dateReserved":"2026-07-19T15:36:31.784Z","dateUpdated":"2026-07-25T08:50:25.427Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:20","lastModifiedDate":"2026-07-25 10:17:20","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64373","Ordinal":"1","Title":"cpufreq: Fix hotplug-suspend race during reboot","CVE":"CVE-2026-64373","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64373","Ordinal":"1","NoteData":"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() -> 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 ]","Type":"Description","Title":"cpufreq: Fix hotplug-suspend race during reboot"}]}}}