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CVE-2021-47289 is a NULL pointer dereference in the Linux kernel ACPI device reference-counting path. A change to ACPI device matching could invoke acpi_dev_put() with a NULL device pointer. The helper did not handle NULL and passed an invalid derived pointer to put_device(), causing a kernel NULL dereference. The upstream fix changes acpi_dev_put() to silently accept NULL pointers.
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Linux kernel ACPI NULL-pointer dereference flaw.
A Linux kernel ACPI NULL-pointer-dereference vulnerability. The content states that the issue has been resolved and addressed for Red Hat Enterprise Linux 8.
A moderate-severity local denial-of-service vulnerability in the Linux kernel ACPI subsystem. The acpi_dev_put() function can dereference a NULL pointer while managing ACPI devices, causing a system crash and instability.
A Linux kernel ACPI NULL-pointer dereference caused by acpi_dev_put() being called with a possibly NULL pointer following a reference-counting change in for_each_acpi_dev_match(). The fix makes acpi_dev_put() accept NULL instead of passing an invalid offset to put_device().
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Cross-references every affected SKU, including bundled OEM variants.
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