CVE-2026-64373
Estado: AnalizadaMedia (4.7)—
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:
Leer descripción completaMostrar menos
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 ]
Detalles técnicos trazas, registros y código del informe original
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
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 4.7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.09%
- Percentil entre todas las CVEs puntuadas: 0
- Fecha de la puntuación: 3/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-362
Referencias
- https://git.kernel.org/stable/c/6d5dd354c37abaf4d60400c55c71f23ba2b33639
- https://git.kernel.org/stable/c/6e175c00c62dca3d91b987015808b5d52e8db2b4
- https://git.kernel.org/stable/c/73255d702c7560185fd5951aadcf7eb057c2f453
- https://git.kernel.org/stable/c/9103078c7b3091a2fbb52af176f95982ee7dd7f8
- https://git.kernel.org/stable/c/a0106b41f9a724868d390b8b3b4ea5ca0e04ea53
- https://git.kernel.org/stable/c/a0ef2fc89d28ca62923376c4b8ffaa57136a36be
- https://git.kernel.org/stable/c/a9029dd55696c651ee46912afa2a166fa456bb3e
- https://git.kernel.org/stable/c/cd4524ff6567fa4458a5bec4b017105e671d393e
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-64373",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 4.7,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 1
}
]
},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
"lessThan": "6d5dd354c37abaf4d60400c55c71f23ba2b33639",
"versionType": "git"
},
{
"status": "affected",
"version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
"lessThan": "9103078c7b3091a2fbb52af176f95982ee7dd7f8",
"versionType": "git"
},
{
"status": "affected",
"version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
"lessThan": "cd4524ff6567fa4458a5bec4b017105e671d393e",
"versionType": "git"
},
{
"status": "affected",
"version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
"lessThan": "73255d702c7560185fd5951aadcf7eb057c2f453",
"versionType": "git"
},
{
"status": "affected",
"version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
"lessThan": "a0ef2fc89d28ca62923376c4b8ffaa57136a36be",
"versionType": "git"
},
{
"status": "affected",
"version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
"lessThan": "6e175c00c62dca3d91b987015808b5d52e8db2b4",
"versionType": "git"
},
{
"status": "affected",
"version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
"lessThan": "a0106b41f9a724868d390b8b3b4ea5ca0e04ea53",
"versionType": "git"
},
{
"status": "affected",
"version": "65650b35133ff20f0c9ef0abd5c3c66dbce3ae57",
"lessThan": "a9029dd55696c651ee46912afa2a166fa456bb3e",
"versionType": "git"
},
{
"status": "affected",
"version": "8bfa06ea6e81bf08d2132d7e70c2b5313b34caf8",
"versionType": "git"
},
{
"status": "affected",
"version": "7ccf3b8b7a12dc9da158c2e699c36d04b2496944",
"versionType": "git"
},
{
"status": "affected",
"version": "5f466713989250938624afa79dc33bae20920700",
"versionType": "git"
},
{
"status": "affected",
"version": "89ab39da1452d272007acc5912d4008047b86706",
"versionType": "git"
},
{
"status": "affected",
"version": "cb4b4601f910c78d2b49f637a12ef98b41cb76a9",
"versionType": "git"
},
{
"status": "affected",
"version": "4.4.198",
"lessThan": "4.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.9.198",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.14.151",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.81",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.3.8",
"lessThan": "5.4",
"versionType": "semver"
}
],
"programFiles": [
"drivers/cpufreq/cpufreq.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/cpufreq/cpufreq.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-07-25T10:17:20.283",
"references": [
{
"url": "https://git.kernel.org/stable/c/6d5dd354c37abaf4d60400c55c71f23ba2b33639",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6e175c00c62dca3d91b987015808b5d52e8db2b4",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/73255d702c7560185fd5951aadcf7eb057c2f453",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9103078c7b3091a2fbb52af176f95982ee7dd7f8",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a0106b41f9a724868d390b8b3b4ea5ca0e04ea53",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a0ef2fc89d28ca62923376c4b8ffaa57136a36be",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a9029dd55696c651ee46912afa2a166fa456bb3e",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cd4524ff6567fa4458a5bec4b017105e671d393e",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-362"
}
]
}
],
"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 ]"
}
],
"lastModified": "2026-09-08T15:23:15.967",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "052914B9-7C0F-45AD-A5C6-9D8F57ABCD5B",
"versionEndExcluding": "4.5",
"versionStartIncluding": "4.4.198"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FA141B73-7D3F-41E0-963D-6F716290C532",
"versionEndExcluding": "4.10",
"versionStartIncluding": "4.9.198"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DA55261D-38B7-426F-A2BC-C10A84345D33",
"versionEndExcluding": "4.15",
"versionStartIncluding": "4.14.151"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EA3CA89D-8A5E-47EA-A6FC-1DC6BE3166E5",
"versionEndExcluding": "4.20",
"versionStartIncluding": "4.19.81"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "427ABFB4-D713-4023-A92C-151DC0A30CCC",
"versionEndExcluding": "5.4",
"versionStartIncluding": "5.3.8"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A94245B8-9422-40E5-B665-36E39CF1AA46",
"versionEndExcluding": "5.10.261",
"versionStartIncluding": "5.4.1"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8E99FB01-CD93-41AF-A653-3F450652B9A6",
"versionEndExcluding": "5.15.212",
"versionStartIncluding": "5.11"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "092233C7-F4E0-40C8-BD4D-A28FE50DFE20",
"versionEndExcluding": "6.1.178",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7046B092-F810-4440-ACE6-60218518EECE",
"versionEndExcluding": "6.6.145",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "38A8100E-2B1A-462F-AEE9-8901B870FEF2",
"versionEndExcluding": "6.12.96",
"versionStartIncluding": "6.7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "914AE4BC-3D59-4C5A-9DB5-9CE327B429F7",
"versionEndExcluding": "6.18.39",
"versionStartIncluding": "6.13"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6228DDD6-4557-4AA3-9F43-AB995D471E42",
"versionEndExcluding": "7.1.4",
"versionStartIncluding": "6.19"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.4:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4D70AB13-37BE-4BD3-A652-10191F1642E4"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.4:rc4:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "81C1EF68-9FF9-416E-AFED-59088978150A"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.4:rc5:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F0E28D41-AC78-413B-AA08-FB73CAFFC58C"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.4:rc6:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EEDE6F28-7530-476B-A838-83E5B2D2A2DD"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.4:rc7:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7BB18ED4-6619-467C-870F-7671261DBEF2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.4:rc8:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D980DAA0-07F8-4C47-B178-0BDDDA234A06"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}