5.5
MEDIUM
CVSS 3.1
CVE-2026-64227
ACPI: driver: Check ACPI_COMPANION() against NULL during probe
Overview
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.
Details
INFO
Published Date :
July 24, 2026, 4:16 p.m.
Last Modified :
Aug. 13, 2026, noon
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
Update the Linux kernel to include ACPI checks for device companions during probe.
- Update the Linux kernel to the latest stable version.
- Ensure all platform drivers check for ACPI companion existence.
- Verify ACPI_COMPANION() and ACPI_HANDLE() checks are in place.
- Adjust thermal zone driver return value for missing companions.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64227.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64227 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64227
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64227 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64227 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.40 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.97 Added Reference Type kernel.org: https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 27, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'f1e12d81f9cd250e722da01c7670b518d4181406', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'a9451bf561232314755baf69a5916e0ac77f33fc', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '34f4d0e4e5065237d15651df759a99e81b7f9f51', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '612ddab8fce04394bd7aebe8e0f2599642e30859', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'e4865a56d013e86e46ea6acea15bb6eae01898ff', 'versionType': 'git'}, {'status': 'affected', 'version': '0', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.18.40', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '7.0.11', 'versionType': 'semver'}], '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'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], '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'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5829046825ac89fffc60f2670bc564fda2c0155a', 'lessThan': 'a9451bf561232314755baf69a5916e0ac77f33fc', 'versionType': 'git'}, {'status': 'affected', 'version': '5829046825ac89fffc60f2670bc564fda2c0155a', 'lessThan': '34f4d0e4e5065237d15651df759a99e81b7f9f51', 'versionType': 'git'}, {'status': 'affected', 'version': '5829046825ac89fffc60f2670bc564fda2c0155a', 'lessThan': '612ddab8fce04394bd7aebe8e0f2599642e30859', 'versionType': 'git'}, {'status': 'affected', 'version': '5829046825ac89fffc60f2670bc564fda2c0155a', 'lessThan': 'e4865a56d013e86e46ea6acea15bb6eae01898ff', 'versionType': 'git'}], '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'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.7'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.7', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], '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'], 'defaultStatus': 'affected'}] Removed Reference https://git.kernel.org/stable/c/f1e12d81f9cd250e722da01c7670b518d4181406 -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 24, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'f1e12d81f9cd250e722da01c7670b518d4181406', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'a9451bf561232314755baf69a5916e0ac77f33fc', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '34f4d0e4e5065237d15651df759a99e81b7f9f51', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '612ddab8fce04394bd7aebe8e0f2599642e30859', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'e4865a56d013e86e46ea6acea15bb6eae01898ff', 'versionType': 'git'}, {'status': 'affected', 'version': '0', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.18.40', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '7.0.11', 'versionType': 'semver'}], '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'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], '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'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51 Added Reference https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859 Added Reference https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc Added Reference https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff Added Reference https://git.kernel.org/stable/c/f1e12d81f9cd250e722da01c7670b518d4181406
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.