Answer in brief
CVE-2026-64373 records a Unknown severity vulnerability in cpufreq: Fix hotplug-suspend race during reboot. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-64373 records a Unknown severity vulnerability in cpufreq: Fix hotplug-suspend race during reboot. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <6d5dd354c37abaf4d60400c55c71f23ba2b33639 || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <9103078c7b3091a2fbb52af176f95982ee7dd7f8 || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <cd4524ff6567fa4458a5bec4b017105e671d393e || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <73255d702c7560185fd5951aadcf7eb057c2f453 || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <a0ef2fc89d28ca62923376c4b8ffaa57136a36be || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <6e175c00c62dca3d91b987015808b5d52e8db2b4 || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <a0106b41f9a724868d390b8b3b4ea5ca0e04ea53 || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <a9029dd55696c651ee46912afa2a166fa456bb3e || 8bfa06ea6e81bf08d2132d7e70c2b5313b34caf8 || 7ccf3b8b7a12dc9da158c2e699c36d04b2496944 || 5f466713989250938624afa79dc33bae20920700 || 89ab39da1452d272007acc5912d4008047b86706 || cb4b4601f910c78d2b49f637a12ef98b41cb76a9 || >=4.4.198 <4.5 || >=4.9.198 <4.10 || >=4.14.151 <4.15 || >=4.19.81 <4.20 || >=5.3.8 <5.4 | 6d5dd354c37abaf4d60400c55c71f23ba2b33639, 9103078c7b3091a2fbb52af176f95982ee7dd7f8, cd4524ff6567fa4458a5bec4b017105e671d393e, 73255d702c7560185fd5951aadcf7eb057c2f453, a0ef2fc89d28ca62923376c4b8ffaa57136a36be, 6e175c00c62dca3d91b987015808b5d52e8db2b4, a0106b41f9a724868d390b8b3b4ea5ca0e04ea53, a9029dd55696c651ee46912afa2a166fa456bb3e, 4.5, 4.10, 4.15, 4.20, 5.4 |
| Linux/Linuxgeneric | 5.4 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
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 ]
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <6d5dd354c37abaf4d60400c55c71f23ba2b33639 || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <9103078c7b3091a2fbb52af176f95982ee7dd7f8 || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <cd4524ff6567fa4458a5bec4b017105e671d393e || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <73255d702c7560185fd5951aadcf7eb057c2f453 || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <a0ef2fc89d28ca62923376c4b8ffaa57136a36be || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <6e175c00c62dca3d91b987015808b5d52e8db2b4 || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <a0106b41f9a724868d390b8b3b4ea5ca0e04ea53 || >=65650b35133ff20f0c9ef0abd5c3c66dbce3ae57 <a9029dd55696c651ee46912afa2a166fa456bb3e || 8bfa06ea6e81bf08d2132d7e70c2b5313b34caf8 || 7ccf3b8b7a12dc9da158c2e699c36d04b2496944 || 5f466713989250938624afa79dc33bae20920700 || 89ab39da1452d272007acc5912d4008047b86706 || cb4b4601f910c78d2b49f637a12ef98b41cb76a9 || >=4.4.198 <4.5 || >=4.9.198 <4.10 || >=4.14.151 <4.15 || >=4.19.81 <4.20 || >=5.3.8 <5.4 | 6d5dd354c37abaf4d60400c55c71f23ba2b33639, 9103078c7b3091a2fbb52af176f95982ee7dd7f8, cd4524ff6567fa4458a5bec4b017105e671d393e, 73255d702c7560185fd5951aadcf7eb057c2f453, a0ef2fc89d28ca62923376c4b8ffaa57136a36be, 6e175c00c62dca3d91b987015808b5d52e8db2b4, a0106b41f9a724868d390b8b3b4ea5ca0e04ea53, a9029dd55696c651ee46912afa2a166fa456bb3e, 4.5, 4.10, 4.15, 4.20, 5.4 |
| Linux/Linuxgeneric | 5.4 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
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 ]
Quoted source text, attributed separately from HOL analysis.