cpufreq: Fix hotplug-suspend race during reboot
Summary
| CVE | CVE-2026-64373 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-25 10:17:20 UTC |
| Updated | 2026-07-25 10:17:20 UTC |
| Description | 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 ] |
Risk And Classification
EPSS: 0.001770000 probability, percentile 0.075050000 (date 2026-07-28)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 6d5dd354c37abaf4d60400c55c71f23ba2b33639 git | Not specified |
| CNA | Linux | Linux | affected 65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 9103078c7b3091a2fbb52af176f95982ee7dd7f8 git | Not specified |
| CNA | Linux | Linux | affected 65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 cd4524ff6567fa4458a5bec4b017105e671d393e git | Not specified |
| CNA | Linux | Linux | affected 65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 73255d702c7560185fd5951aadcf7eb057c2f453 git | Not specified |
| CNA | Linux | Linux | affected 65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 a0ef2fc89d28ca62923376c4b8ffaa57136a36be git | Not specified |
| CNA | Linux | Linux | affected 65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 6e175c00c62dca3d91b987015808b5d52e8db2b4 git | Not specified |
| CNA | Linux | Linux | affected 65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 a0106b41f9a724868d390b8b3b4ea5ca0e04ea53 git | Not specified |
| CNA | Linux | Linux | affected 65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 a9029dd55696c651ee46912afa2a166fa456bb3e git | Not specified |
| CNA | Linux | Linux | affected 8bfa06ea6e81bf08d2132d7e70c2b5313b34caf8 git | Not specified |
| CNA | Linux | Linux | affected 7ccf3b8b7a12dc9da158c2e699c36d04b2496944 git | Not specified |
| CNA | Linux | Linux | affected 5f466713989250938624afa79dc33bae20920700 git | Not specified |
| CNA | Linux | Linux | affected 89ab39da1452d272007acc5912d4008047b86706 git | Not specified |
| CNA | Linux | Linux | affected cb4b4601f910c78d2b49f637a12ef98b41cb76a9 git | Not specified |
| CNA | Linux | Linux | affected 4.4.198 4.5 semver | Not specified |
| CNA | Linux | Linux | affected 4.9.198 4.10 semver | Not specified |
| CNA | Linux | Linux | affected 4.14.151 4.15 semver | Not specified |
| CNA | Linux | Linux | affected 4.19.81 4.20 semver | Not specified |
| CNA | Linux | Linux | affected 5.3.8 5.4 semver | Not specified |
| CNA | Linux | Linux | affected 5.4 | Not specified |
| CNA | Linux | Linux | unaffected 5.4 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.261 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.212 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.96 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.39 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.4 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/9103078c7b3091a2fbb52af176f95982ee7dd7f8 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6d5dd354c37abaf4d60400c55c71f23ba2b33639 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/73255d702c7560185fd5951aadcf7eb057c2f453 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a9029dd55696c651ee46912afa2a166fa456bb3e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6e175c00c62dca3d91b987015808b5d52e8db2b4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a0106b41f9a724868d390b8b3b4ea5ca0e04ea53 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a0ef2fc89d28ca62923376c4b8ffaa57136a36be | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/cd4524ff6567fa4458a5bec4b017105e671d393e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.