{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-64373", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.784Z", "datePublished": "2026-07-25T08:50:25.427Z", "dateUpdated": "2026-08-17T04:54:23.307Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:54:23.307Z" }, "descriptions": [ { "lang": "en", "value": "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 ]" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/cpufreq/cpufreq.c" ], "versions": [ { "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57", "lessThan": "6d5dd354c37abaf4d60400c55c71f23ba2b33639", "status": "affected", "versionType": "git" }, { "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57", "lessThan": "9103078c7b3091a2fbb52af176f95982ee7dd7f8", "status": "affected", "versionType": "git" }, { "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57", "lessThan": "cd4524ff6567fa4458a5bec4b017105e671d393e", "status": "affected", "versionType": "git" }, { "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57", "lessThan": "73255d702c7560185fd5951aadcf7eb057c2f453", "status": "affected", "versionType": "git" }, { "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57", "lessThan": "a0ef2fc89d28ca62923376c4b8ffaa57136a36be", "status": "affected", "versionType": "git" }, { "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57", "lessThan": "6e175c00c62dca3d91b987015808b5d52e8db2b4", "status": "affected", "versionType": "git" }, { "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57", "lessThan": "a0106b41f9a724868d390b8b3b4ea5ca0e04ea53", "status": "affected", "versionType": "git" }, { "version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57", "lessThan": "a9029dd55696c651ee46912afa2a166fa456bb3e", "status": "affected", "versionType": "git" }, { "version": "8bfa06ea6e81bf08d2132d7e70c2b5313b34caf8", "status": "affected", "versionType": "git" }, { "version": "7ccf3b8b7a12dc9da158c2e699c36d04b2496944", "status": "affected", "versionType": "git" }, { "version": "5f466713989250938624afa79dc33bae20920700", "status": "affected", "versionType": "git" }, { "version": "89ab39da1452d272007acc5912d4008047b86706", "status": "affected", "versionType": "git" }, { "version": "cb4b4601f910c78d2b49f637a12ef98b41cb76a9", "status": "affected", "versionType": "git" }, { "version": "4.4.198", "lessThan": "4.5", "status": "affected", "versionType": "semver" }, { "version": "4.9.198", "lessThan": "4.10", "status": "affected", "versionType": "semver" }, { "version": "4.14.151", "lessThan": "4.15", "status": "affected", "versionType": "semver" }, { "version": "4.19.81", "lessThan": "4.20", "status": "affected", "versionType": "semver" }, { "version": "5.3.8", "lessThan": "5.4", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/cpufreq/cpufreq.c" ], "versions": [ { "version": "5.4", "status": "affected" }, { "version": "0", "lessThan": "5.4", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.12.96" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.18.39" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "7.1.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "7.2" }, { "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:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.81" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3.8" } ] } ] } ], "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", 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