CVE-2024-53984 Nanopb does not release memory on error return when using PB_DECODE_DELIMITED

Nanopb is a small code-size Protocol Buffers implementation. When the compile time option PBENABLEMALLOC is enabled, the message contains at least one field with FTPOINTER field type, custom stream callback is used with unknown stream length. and the pbdecodeex function is used with flag...