static uint16_t extension_payload(bitfile *ld, drc_info *drc, uint16_t count)
{
    uint16_t i, n, dataElementLength;
    uint8_t dataElementLengthPart;
    uint8_t align = 4, data_element_version, loopCounter;

    uint8_t extension_type = (uint8_t)faad_getbits(ld, 4
        DEBUGVAR(1,87,"extension_payload(): extension_type"));

    switch (extension_type)
    {
    case EXT_DYNAMIC_RANGE:
        drc->present = 1;
        n = dynamic_range_info(ld, drc);
        return n;
    case EXT_FILL_DATA:
        /* fill_nibble = */ faad_getbits(ld, 4
            DEBUGVAR(1,136,"extension_payload(): fill_nibble")); /* must be 0000 */
        for (i = 0; i < count-1; i++)
        {
            /* fill_byte[i] = */ faad_getbits(ld, 8
                DEBUGVAR(1,88,"extension_payload(): fill_byte")); /* must be 10100101 */
        }
        return count;
    case EXT_DATA_ELEMENT:
        data_element_version = (uint8_t)faad_getbits(ld, 4
            DEBUGVAR(1,400,"extension_payload(): data_element_version"));
        switch (data_element_version)
        {
        case ANC_DATA:
            loopCounter = 0;
            dataElementLength = 0;
            do {
                dataElementLengthPart = (uint8_t)faad_getbits(ld, 8
                    DEBUGVAR(1,401,"extension_payload(): dataElementLengthPart"));
                dataElementLength += dataElementLengthPart;
                loopCounter++;
            } while (dataElementLengthPart == 255);

            for (i = 0; i < dataElementLength; i++)
            {
                /* data_element_byte[i] = */ faad_getbits(ld, 8
                    DEBUGVAR(1,402,"extension_payload(): data_element_byte"));
                return (dataElementLength+loopCounter+1);
            }
        default:
            align = 0;
        }
    case EXT_FIL:
    default:
        faad_getbits(ld, align
            DEBUGVAR(1,88,"extension_payload(): fill_nibble"));
        for (i = 0; i < count-1; i++)
        {
            /* other_bits[i] = */ faad_getbits(ld, 8
               DEBUGVAR(1,89,"extension_payload(): fill_bit"));
        }
        return count;
    }
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.