CVE-2026-64373
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 ]
Affected products
23cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 7 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=4.4.198,<4.5
- cpe:2.3:o:linux:linux_kernel:5.4:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.4:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.4:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.4:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.4:rc7:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.4:rc8:*:*:*:*:*:*
- (no CPE)
- osv-coords15 versionspkg:linux/kernelpkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0
>= 5.4.0, < 5.10.261+ 14 more
- (no CPE)range: >= 5.4.0, < 5.10.261
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1.160000.2.22
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 7.1.7-1.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/6d5dd354c37abaf4d60400c55c71f23ba2b33639nvdPatch
- git.kernel.org/stable/c/6e175c00c62dca3d91b987015808b5d52e8db2b4nvdPatch
- git.kernel.org/stable/c/73255d702c7560185fd5951aadcf7eb057c2f453nvdPatch
- git.kernel.org/stable/c/9103078c7b3091a2fbb52af176f95982ee7dd7f8nvdPatch
- git.kernel.org/stable/c/a0106b41f9a724868d390b8b3b4ea5ca0e04ea53nvdPatch
- git.kernel.org/stable/c/a0ef2fc89d28ca62923376c4b8ffaa57136a36benvdPatch
- git.kernel.org/stable/c/a9029dd55696c651ee46912afa2a166fa456bb3envdPatch
- git.kernel.org/stable/c/cd4524ff6567fa4458a5bec4b017105e671d393envdPatch
News mentions
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