Answer in brief
CVE-2026-64373 records a Medium severity (CVSS 4.7) 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.
CVSS is 4.7. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.4:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.4:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.4:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.4:rc6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.4:rc7:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.4:rc8:*:*:*:*:*:* | Not reported | Not reported |
| 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
Sep 8, 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.