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CVE-2025-38345 is a Linux kernel vulnerability in ACPICA's dswstate.c that causes ACPI operand objects to be leaked during ACPI interpreter early termination. The flaw is triggered when ACPI initialization aborts because of a malformed or malicious ACPI table, but the kernel continues the boot process. The root cause is a stack index mismatch: acpi_ds_obj_stack_push() uses walk_state->operand_index as the top-of-stack position, while acpi_ds_obj_stack_pop_and_delete() incorrectly treats index 0 as the top. This miscalculation prevents proper cleanup of operand objects and leaves entries in the Acpi-Operand slab cache. On affected systems, kernel teardown can report a remaining-object cache leak during ACPI termination.
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