CVE-2026-64372

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> cpufreq: pcc: fix use-after-free and double free in _OSC evaluation<br /> <br /> pcc_cpufreq_do_osc() calls acpi_evaluate_object() twice for the<br /> two-phase _OSC negotiation. Between the two calls it freed<br /> output.pointer but left output.length unchanged. Since<br /> acpi_evaluate_object() treats a non-zero length with a non-NULL<br /> pointer as an existing buffer to write into, the second call wrote<br /> into freed memory (use-after-free). The subsequent kfree(output.pointer)<br /> at out_free then freed the same pointer a second time (double free).<br /> <br /> Reset output.pointer to NULL and output.length to ACPI_ALLOCATE_BUFFER<br /> after freeing the first result, so ACPICA allocates a fresh buffer for<br /> each phase independently.