ACPI: driver: Check ACPI_COMPANION() against NULL during probe

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Summary

CVECVE-2026-64227
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-24 16:16:51 UTC
Updated2026-07-24 16:16:51 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 f1e12d81f9cd250e722da01c7670b518d4181406 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 a9451bf561232314755baf69a5916e0ac77f33fc git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 34f4d0e4e5065237d15651df759a99e81b7f9f51 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 612ddab8fce04394bd7aebe8e0f2599642e30859 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 e4865a56d013e86e46ea6acea15bb6eae01898ff git Not specified
CNA Linux Linux affected 6.6.145 semver Not specified
CNA Linux Linux affected 6.12.97 semver Not specified
CNA Linux Linux affected 6.18.40 semver Not specified
CNA Linux Linux affected 7.0.11 semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f1e12d81f9cd250e722da01c7670b518d4181406 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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