CVE-2026-43149

A flaw was found in the Linux kernel's `fsl_ucc_hdlc` module. The `uhdlc_memclean()` function incorrectly deallocates memory by calling `dma_free_coherent()` twice for buffers that were allocated as a single contiguous block. This improper memory handling may lead to a denial of service (DoS) or other unpredictable system behavior due to memory corruption.