CVE-2026-64227
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: ACPI: driver: Check ACPI_COMPANION() against NULL during probe Since every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), platform drivers that rely on the existence of a device's ACPI companion object should verify its presence. Accordingly, add requisite ACPI_COMPANION() or ACPI_HANDLE() checks against NULL to 13 platform drivers handling core ACPI devices. Also change the value returned by the ACPI thermal zone driver when the device's ACPI companion is not present to -ENODEV for consistency with the other drivers.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-07-24 16:16:51.793000
Last modified
2026-11-06 17:18:42.640000
View original CVE JSON
{
"id": "CVE-2026-64227",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-07-24T16:16:51.793",
"lastModified": "2026-11-06T17:18:42.640",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: driver: Check ACPI_COMPANION() against NULL during probe\n\nSince every platform driver can be forced to match a device that doesn't\nmatch its list of device IDs because of device_match_driver_override(),\nplatform drivers that rely on the existence of a device's ACPI companion\nobject should verify its presence.\n\nAccordingly, add requisite ACPI_COMPANION() or ACPI_HANDLE() checks\nagainst NULL to 13 platform drivers handling core ACPI devices.\n\nAlso change the value returned by the ACPI thermal zone driver when\nthe device's ACPI companion is not present to -ENODEV for consistency\nwith the other drivers."
}
],
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"affectedData": [
{
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"defaultStatus": "unaffected",
"programFiles": [
"drivers/acpi/ac.c",
"drivers/acpi/acpi_pad.c",
"drivers/acpi/acpi_tad.c",
"drivers/acpi/battery.c",
"drivers/acpi/button.c",
"drivers/acpi/ec.c",
"drivers/acpi/hed.c",
"drivers/acpi/nfit/core.c",
"drivers/acpi/pfr_telemetry.c",
"drivers/acpi/pfr_update.c",
"drivers/acpi/sbs.c",
"drivers/acpi/sbshc.c",
"drivers/acpi/thermal.c",
"drivers/acpi/tiny-power-button.c"
],
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"drivers/acpi/battery.c",
"drivers/acpi/button.c",
"drivers/acpi/ec.c",
"drivers/acpi/hed.c",
"drivers/acpi/nfit/core.c",
"drivers/acpi/pfr_telemetry.c",
"drivers/acpi/pfr_update.c",
"drivers/acpi/sbs.c",
"drivers/acpi/sbshc.c",
"drivers/acpi/thermal.c",
"drivers/acpi/tiny-power-button.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
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{
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},
{
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"versionType": "original_commit_for_fix",
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],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
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"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-06T16:32:33.166548Z",
"id": "CVE-2026-64227",
"options": [
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{
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"role": "CISA Coordinator",
"version": "2.0.3"
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},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-476"
}
]
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"configurations": [
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